{"id":190989,"date":"2023-06-21T14:07:44","date_gmt":"2023-06-21T06:07:44","guid":{"rendered":"https:\/\/www.idc.net\/help\/190989\/"},"modified":"2023-06-21T14:07:44","modified_gmt":"2023-06-21T06:07:44","slug":"%e5%90%8e%e6%b5%aa%e4%ba%91react%e6%95%99%e7%a8%8b%ef%bc%9a%e5%9b%be%e7%89%87","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/190989\/","title":{"rendered":"\u540e\u6d6a\u4e91React\u6559\u7a0b\uff1a\u56fe\u7247"},"content":{"rendered":"

\u4e00\u4e2a react \u7684\u7ec4\u4ef6\u7528\u4ee5\u663e\u793a\u4e0d\u540c\u7c7b\u578b\u7684\u56fe\u7247\uff0c\u5305\u62ec\u7f51\u7edc\u56fe\u7247\uff0c\u9759\u6001\u8d44\u6e90\uff0c\u4e34\u65f6\u7684\u672c\u5730\u56fe\u7247\uff0c\u8fd8\u6709\u672c\u5730\u78c1\u76d8\u7684\u56fe\u7247\uff0c\u6bd4\u5982\u624b\u673a\u7167\u7247\u3002<\/p>\n

\u4e3e\u4f8b\uff1a<\/p>\n

renderImages: function() {  return (\n    <View>\n      <Image\n        style={styles.icon}\n        source={require('image!myIcon')}\n      \/>\n      <Image\n        style={styles.logo}\n        source={{uri: 'http:\/\/facebook.github.io\/react\/img\/logo_og.png'}}\n      \/>\n    <\/View>\n  );\n},<\/pre>\n
\u652f\u6491\u5de5\u5177<\/h3>\n
onLayout<\/strong> \u51fd\u6570
\u5728\u8fdb\u884c\u88c5\u8f7d\u548c\u5e03\u5c40\u6539\u53d8\u7684\u65f6\u5019\u4f7f\u7528{nativeEvent: {layout: {x, y, width, height}}}<\/code>\u8c03\u7528\u3002<\/p>\n
resizeMode<\/strong> \u679a\u4e3e ('cover', 'contain', 'stretch')
\u5f53\u5e27\u4e0e\u539f\u59cb\u56fe\u50cf\u5c3a\u5bf8\u4e0d\u5339\u914d\u65f6\u7528\u4e8e\u786e\u5b9a\u5982\u4f55\u8c03\u6574\u56fe\u50cf\u7684\u5927\u5c0f\u3002<\/p>\n
source<\/strong> {uri: string}\uff0c\u7f16\u53f7 uri<\/code> \u662f\u4e00\u4e2a\u4ee3\u8868\u56fe\u7247\u8d44\u6e90\u6807\u8bc6\u7b26\u7684\u5b57\u7b26\u4e32\uff0c\u5b83\u53ef\u4ee5\u662f http \u5730\u5740\u3001 \u672c\u5730\u6587\u4ef6\u8def\u5f84\u6216\u9759\u6001\u56fe\u50cf\u8d44\u6e90\u7684\u540d\u79f0 (\u5b83\u88ab\u5305\u542b\u5728 require('image!name')<\/code> \u51fd\u6570\u4e2d) \u3002<\/p>\n
style<\/strong> \u6837\u5f0f
Flexbox<\/strong>......
Transforms<\/strong>...
resizeMode<\/strong> Object.keys(ImageResizeMode)
backgroundColor<\/strong> \u5b57\u7b26\u4e32
borderColor<\/strong> \u5b57\u7b26\u4e32
borderWidth<\/strong> \u6570\u5b57
borderRadius<\/strong> \u6570\u5b57
overflow<\/strong> \u679a\u4e3e('visible', 'hidden')
tintColor<\/strong> \u5b57\u7b26\u4e32
opacity<\/strong> \u6570\u5b57<\/p>\n
testID<\/strong> \u5b57\u7b26\u4e32 \u4e00\u4e2a\u5728 UI \u81ea\u52a8\u6d4b\u8bd5\u811a\u672c\u4e2d\u4f7f\u7528\u6b64\u5143\u7d20\u7684\u552f\u4e00\u6807\u8bc6\u7b26\u3002<\/p>\n
ios<\/code> accessibilityLabel<\/strong> \u5b57\u7b26\u4e32<\/p>\n
\u5728\u7528\u6237\u4e0e\u56fe\u50cf\u4ea4\u4e92\u65f6\uff0c\u8be5\u6587\u672c\u4f1a\u7531\u5c4f\u5e55\u9605\u8bfb\u5668\u8bfb\u53d6\u3002<\/p>\n
ios<\/code> accessible<\/strong> \u5e03\u5c14\u503c
\u5f53\u4e3a true \u7684\u65f6\u5019\uff0c\u6307\u793a\u56fe\u50cf\u662f\u53ef\u8bbf\u95ee\u7684\u5143\u7d20\u3002<\/p>\n
ios<\/code> capInsets<\/strong> {top: number, left: number, bottom: number, right: number}
\u5f53\u56fe\u50cf\u7684\u5927\u5c0f\u88ab\u91cd\u65b0\u8c03\u6574\u65f6\uff0c\u7531 capInsets \u6307\u5b9a\u7684\u89d2\u843d\u7684\u5927\u5c0f\u5c06\u4fdd\u6301\u5728\u4e00\u4e2a\u56fa\u5b9a\u7684\u503c\uff0c\u4f46\u4e2d\u5fc3\u5185\u5bb9\u548c\u56fe\u50cf\u7684\u8fb9\u754c\u5c06\u88ab\u62c9\u4f38\u3002\u8fd9\u7528\u4e8e\u521b\u5efa\u53ef\u8c03\u6574\u5927\u5c0f\u7684\u5706\u5f62\u6309\u94ae\u3001 \u9634\u5f71\u548c\u5176\u4ed6\u53ef\u8c03\u6574\u5927\u5c0f\u7684\u8d44\u6e90\u3002\u66f4\u591a\u5173\u4e8e\u82f9\u679c\u7684\u6587\u6863\u8bf7\u70b9\u51fb\u6b64\u5904\u3002<\/p>\n
ios<\/code> defaultSource<\/strong> {uri: string}
\u5728\u4e0b\u8f7d\u6700\u7ec8\u56fe\u50cf\u5e76\u4e14\u7f51\u7edc\u65ad\u5f00\u7684\u65f6\u5019\u7528\u6765\u663e\u793a\u7684\u9759\u6001\u56fe\u50cf\u3002<\/p>\n
ios<\/code> onError<\/strong> \u51fd\u6570
\u5728\u52a0\u8f7d\u9519\u8bef\u7684\u65f6\u5019\u4f7f\u7528 {nativeEvent: {error}}<\/code> \u8fdb\u884c\u8c03\u7528\u3002<\/p>\n
ios<\/code> onLoadEndr<\/strong> \u51fd\u6570
\u5f53\u5b8c\u5168\u52a0\u8f7d\u6210\u529f\u65f6\u8fdb\u884c\u8c03\u7528\u3002<\/p>\n
ios<\/code> onLoadEnd<\/strong> \u51fd\u6570
\u4e0d\u7ba1\u52a0\u8f7d\u6210\u529f\u8fd8\u662f\u5931\u8d25\u90fd\u4f1a\u8c03\u7528\u3002<\/p>\n
ios<\/code> onLoadStart<\/strong> \u51fd\u6570
\u52a0\u8f7d\u6210\u529f\u7684\u65f6\u5019\u8c03\u7528\u3002<\/p>\n
ios<\/code> onProgress<\/strong> \u51fd\u6570
\u5728\u4e0b\u8f7d\u8fdb\u7a0b\u4e2d\u4f7f\u7528 {nativeEvent: {loaded, total}}<\/code> \u8fdb\u884c\u8c03\u7528\u3002<\/p>\n
\u63cf\u8ff0<\/h3>\n
\u9759\u6001\u8d44\u6e90<\/h2>\n
\u5728\u9879\u76ee\u7684\u8fdb\u7a0b\u4e2d\uff0c\u6dfb\u52a0\u5e76\u4e14\u79fb\u9664\u548c\u5904\u7406\u90a3\u4e9b\u5728\u5e94\u7528\u7a0b\u5e8f\u4e0d\u662f\u7ecf\u5e38\u4f7f\u7528\u7684\u56fe\u7247\u662f\u5f88\u5e38\u89c1\u7684\u60c5\u51b5\u3002\u4e3a\u4e86\u5904\u7406\u8fd9\u79cd\u60c5\u51b5\uff0c\u6211\u4eec\u9700\u8981\u627e\u5230\u4e00\u4e2a\u65b9\u6cd5\u6765\u9759\u6001\u5730\u5b9a\u4f4d\u90a3\u4e9b\u88ab\u7528\u5728\u5e94\u7528\u7a0b\u5e8f\u91cc\u7684\u56fe\u7247\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u4f7f\u7528\u4e86\u4e00\u4e2a\u6807\u8bb0\u5668\u3002\u552f\u4e00\u5141\u8bb8\u7684\u6307\u5411 bundle \u91cc\u7684\u56fe\u7247\u7684\u65b9\u6cd5\u5c31\u662f\u5728\u6e90\u6587\u4ef6\u4e2d\u904d\u5386\u5730\u641c\u7d22 require('image!name-of-the-asset')<\/code> \u3002<\/p>\n
\/\/ GOOD<Image source={require('image!my-icon')} \/>\/\/ BADvar icon = this.props.active ? 'my-icon-active' : 'my-icon-inactive';<Image source={require('image!' + icon)} \/>\/\/ GOOD\nvar icon = this.props.active ? require('image!my-icon-active') : require('image!my-icon-inactive');<Image source={icon} \/><\/pre>\n
\u5f53\u4e3b\u8981\u7684\u4ee3\u7801\u6267\u884c\u5230\u8fd9\u91cc\uff0c\u4f60\u5c31\u53ef\u4ee5\u505a\u4e00\u4e9b\u6709\u8da3\u7684\u4e8b\u60c5\uff0c\u6bd4\u5982\u81ea\u52a8\u5c06\u90a3\u4e9b\u7528\u4e8e\u5e94\u7528\u7a0b\u5e8f\u7684 assets \u6253\u5305\u3002\u6ce8\u610f\uff0c\u8fd9\u4e9b\u4ee3\u7801\u4e0d\u662f\u5f3a\u5236\u5b9e\u65bd\u7684\uff0c\u4f46\u4e0d\u4ee3\u8868\u5c06\u6765\u4e5f\u4e0d\u4f1a\u3002<\/p>\n
\u4f7f\u7528 Images.xcassets \u5c06\u9759\u6001\u8d44\u6e90\u6dfb\u52a0\u5230\u4f60\u7684 iOS \u5e94\u7528\u7a0b\u5e8f\u4e2d<\/h3>\n
\n
\n
NOTE<\/strong>: \u751f\u6210\u5e94\u7528\u7a0b\u5e8f\u6240\u9700\u7684\u65b0\u8d44\u6e90<\/p>\n
\u65e0\u8bba\u5728\u4ec0\u4e48\u65f6\u5019\uff0c\u60a8\u60f3\u628a\u65b0\u7684\u8d44\u6e90\u6dfb\u52a0\u5230 Images.xcassets<\/code> \u4e2d\uff0c\u60a8\u90fd\u9700\u8981\u5728\u4f7f\u7528\u5b83\u4e4b\u524d\u901a\u8fc7 Xcode \u6765\u91cd\u65b0\u6784\u5efa\u60a8\u7684\u5e94\u7528\u7a0b\u5e8f \u2014 \u2014 \u4ec5\u5728\u6a21\u62df\u5668\u5185\u91cd\u65b0\u52a0\u8f7d\u5b83\u662f\u4e0d\u591f\u7684\u3002<\/p>\n<\/blockquote>\n
\u8fd9\u4e00\u8fdb\u7a0b\u6b63\u5728\u88ab\u6539\u8fdb\uff0c\u4e0d\u4e45\u5c31\u4f1a\u63d0\u4f9b\u66f4\u597d\u7684\u5de5\u4f5c\u6d41\u7a0b\u3002<\/em><\/p>\n
\u5c06\u9759\u6001\u8d44\u6e90\u6dfb\u52a0\u5230\u60a8\u7684 Android \u5e94\u7528\u7a0b\u5e8f\u4e2d<\/h3>\n
\u5c06\u60a8\u7684\u56fe\u50cf\u4f5c\u4e3a\u4f4d\u56fe\u753b\u677f\u6dfb\u52a0\u5230 android \u9879\u76ee\u4e2d\uff08<yourapp>\/android\/app\/src\/main\/res<\/code>\uff09\u3002 \u4e3a\u4e86\u7ed9\u60a8\u7684 assets \u6587\u4ef6\u63d0\u4f9b\u4e0d\u540c\u7684\u5206\u8fa8\u7387\uff0c\u4f7f\u7528 \u914d\u7f6e\u9650\u5b9a\u7b26\u8fdb\u884c\u68c0\u67e5\u3002 \u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u60a8\u5c06\u60f3\u8981\u628a\u60a8\u7684 assets \u6587\u4ef6\u653e\u5728\u4e0b\u5217\u76ee\u5f55 (\u5982\u679c\u5b83\u4eec\u4e0d\u5b58\u5728\uff0c\u90a3\u4e48\u5728 res<\/code> \u4e0b\u521b\u5efa\u5b83\u4eec)\uff1a<\/p>\n
    \n
  • \n
    drawable-mdpi<\/code> (1x)<\/p>\n<\/li>\n
  • \n
    drawable-hdpi<\/code> (1.5x)<\/p>\n<\/li>\n
  • \n
    drawable-xhdpi<\/code> (2x)<\/p>\n<\/li>\n
  • \n
    drawable-xxhdpi<\/code> (3x)<\/p>\n<\/li>\n<\/ul>\n
    \u5982\u679c\u60a8\u7684 asset \u6587\u4ef6\u4e22\u5931\u4e86\u4e00\u79cd\u5206\u8fa8\u7387\uff0c\u90a3\u4e48 Android \u5c06\u91c7\u53d6\u4e0b\u4e00\u4e2a\u6700\u597d\u7684\u5206\u8fa8\u7387\u5e76\u4e14\u4e3a\u60a8\u8c03\u6574\u5b83\u7684\u5927\u5c0f\u3002<\/p>\n
    \n
    NOTE<\/strong>: \u751f\u6210\u5e94\u7528\u7a0b\u5e8f\u6240\u9700\u7684\u65b0\u8d44\u6e90<\/p>\n
    \u65e0\u8bba\u5728\u4ec0\u4e48\u65f6\u5019\u60a8\u628a\u65b0\u7684\u8d44\u6e90\u6dfb\u52a0\u5230\u60a8\u7684\u753b\u677f\u4e2d\u60a8\u90fd\u9700\u8981\u5728\u4f7f\u7528\u5b83\u4e4b\u524d\u901a\u8fc7\u8fd0\u884c react-native run-android<\/code> \u91cd\u65b0\u6784\u5efa\u60a8\u7684\u5e94\u7528\u7a0b\u5e8f - \u4ec5\u91cd\u65b0\u52a0\u8f7d JS \u662f\u4e0d\u591f\u7684\u3002<\/p>\n<\/blockquote>\n
    \u8fd9\u4e00\u8fdb\u7a0b\u6b63\u5728\u88ab\u6539\u8fdb\uff0c\u4e0d\u4e45\u5c31\u4f1a\u63d0\u4f9b\u66f4\u597d\u7684\u5de5\u4f5c\u6d41\u7a0b\u3002<\/em><\/p>\n
    \u7f51\u7edc\u8d44\u6e90<\/h2>\n
    \u5728\u60a8\u8fdb\u884c\u7f16\u8bd1\u7684\u65f6\u5019\uff0c\u8bb8\u591a\u60a8\u7684\u5e94\u7528\u7a0b\u5e8f\u4e2d\u9700\u8981\u5c55\u793a\u7684\u56fe\u7247\u90fd\u4e0d\u80fd\u4f7f\u7528\uff0c\u6216\u8005\u4f60\u4f1a\u60f3\u8981\u901a\u8fc7\u52a0\u8f7d\u4e00\u4e9b\u52a8\u6001\u56fe\u7247\u6765\u4fdd\u6301\u4e8c\u8fdb\u5236\u5927\u5c0f\u5728\u8f83\u4f4e\u7684\u72b6\u6001\u3002\u4e0d\u50cf\u9759\u6001\u8d44\u6e90\u90a3\u6837\uff0c\u60a8\u5c06\u9700\u8981\u624b\u52a8\u6307\u5b9a\u56fe\u50cf\u7684\u5c3a\u5bf8<\/em>\u3002<\/p>\n
    \/\/ GOOD<Image source={{uri: 'https:\/\/facebook.github.io\/react\/img\/logo_og.png'}}\n       style={{width: 400, height: 400}} \/>\/\/ BAD<Image source={{uri: 'https:\/\/facebook.github.io\/react\/img\/logo_og.png'}} \/><\/pre>\n
    \u672c\u5730\u6587\u4ef6\u7cfb\u7edf\u8d44\u6e90<\/h2>\n
    \u8bf7\u5728 CameraRoll \u4e2d\u67e5\u770b\u4f7f\u7528 Images.xcassets<\/code> \u4e4b\u5916\u7684\u672c\u5730\u8d44\u6e90\u793a\u4f8b \u3002<\/p>\n
    \u6700\u597d\u7684\u76f8\u7247\u518c\u56fe\u7247<\/h3>\n
    iOS \u7684\u76f8\u7247\u518c\u53ef\u4ee5\u8ba9\u4f60\u5c06\u540c\u4e00\u5f20\u56fe\u7247\u4fdd\u5b58\u4e3a\u4e0d\u540c\u7684\u5c3a\u5bf8\uff0c\u5bf9\u4e8e\u9009\u62e9\u90a3\u5f20\u63a5\u8fd1\u4f60\u60f3\u8981\u5c3a\u5bf8\u7684\u56fe\u7247\u6765\u8bf4\uff0c\u8fd9\u5f88\u91cd\u8981\u3002\u4f60\u4e0d\u4f1a\u60f3\u7528\u4e00\u5f20 3264x2448 \u5206\u8fa8\u7387\u7684\u56fe\u7247\u4f5c\u4e3a\u8d44\u6e90\u6765\u663e\u793a\u4e00\u4e2a 200x200 \u7684\u7f29\u7565\u56fe\u3002\u5982\u679c\u786e\u5b9e\u6709\u7b26\u5408\u4f60\u8981\u6c42\u7684\u5c3a\u5bf8\uff0c React Native \u4f1a\u81ea\u52a8\u9009\u62e9\u5b83\uff0c\u5426\u5219\u5b83\u4f1a\u4f7f\u7528\u7b2c\u4e00\u5f20\u6bd4\u7279\u5b9a\u5c3a\u5bf8\u5927 50% \u7684\u56fe\u7247\u6765\u907f\u514d\u91cd\u65b0\u5b9a\u4e49\u5c3a\u5bf8\u65f6\u5e26\u6765\u7684\u6a21\u7cca\u5931\u771f\u3002\u8fd9\u4e9b\u5de5\u4f5c React Native \u81ea\u52a8\u5e2e\u4f60\u5b8c\u6210\u4e86\uff0c\u6240\u4ee5\u4f60\u4e0d\u5fc5\u518d\u81ea\u5df1\u7f16\u5199\u4e4f\u5473\u548c\u5bb9\u6613\u51fa\u9519\u7684\u4ee3\u7801\u3002<\/p>\n
    \u4e3a\u4ec0\u4e48\u4e0d\u81ea\u52a8\u8c03\u6574\u6240\u6709\u4e8b\u7269\uff1f<\/h2>\n
    \u5728\u6d4f\u89c8\u5668\u4e2d<\/em> \u5982\u679c\u4f60\u4e0d\u7ed9\u4e00\u4e2a\u56fe\u50cf\u89c4\u5b9a\u5927\u5c0f\uff0c\u90a3\u4e48\u6d4f\u89c8\u5668\u4f1a\u5448\u73b0\u4e00\u4e2a 0x0 \u7684\u5143\u7d20\u3001 \u968f\u540e\u4e0b\u8f7d\u56fe\u50cf\uff0c\u7136\u540e\u518d\u4ee5\u6b63\u786e\u7684\u5c3a\u5bf8\u5448\u73b0\u56fe\u50cf\u3002\u8fd9\u79cd\u884c\u4e3a\u6700\u5927\u7684\u95ee\u9898\u662f\uff0c\u60a8\u7684 UI \u4f1a\u5728\u6b63\u5728\u52a0\u8f7d\u7684\u56fe\u50cf\u56db\u5468\u8df3\u52a8\uff0c\u8fd9\u4f1a\u9020\u6210\u4e00\u4e2a\u975e\u5e38\u7cdf\u7cd5\u7684\u7528\u6237\u4f53\u9a8c\u3002<\/p>\n
    \u5728 React Native<\/em> \u4e2d\u6545\u610f\u4e0d\u5b9e\u65bd\u8be5\u884c\u4e3a\u3002\u5b83\u7684\u76ee\u7684\u662f\u8ba9\u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u63d0\u524d\u77e5\u9053\u8fdc\u7a0b\u56fe\u50cf\u7684\u5c3a\u5bf8 (\u6216\u56fe\u5f62\u6bd4\u4f8b)\uff0c\u6211\u4eec\u8ba4\u4e3a\u8fd9\u6837\u505a\u7684\u8bdd\u53ef\u4ee5\u5b9e\u73b0\u66f4\u597d\u7684\u7528\u6237\u4f53\u9a8c\u3002\u901a\u8fc7\u4f7f\u7528 require('image!x')<\/code> \u8bed\u6cd5\u4ece\u5e94\u7528\u7a0b\u5e8f\u5305\u4e2d\u52a0\u8f7d\u7684\u9759\u6001\u56fe\u7247\u53ef\u4ee5\u81ea\u52a8\u7684\u8c03\u6574\u5927\u5c0f\uff0c\u56e0\u4e3a\u5b83\u4eec\u7684\u5c3a\u5bf8\u5728\u5b89\u88c5\u65f6\u7acb\u5373\u53ef\u7528\u3002<\/p>\n
    \u4f8b\u5982\uff0c\u4e0a\u8ff0\u4f7f\u7528 'require('image!logo')' \u5c4f\u5e55\u622a\u56fe\u7684\u7ed3\u679c\uff1a<\/p>\n
    {\"__packager_asset\":true,\"isStatic\":true,\"path\":\"\/Users\/react\/HelloWorld\/iOS\/Images.xcassets\/react.imageset\/logo.png\",\"uri\":\"logo\",\"width\":591,\"height\":573}<\/pre>\n
    Source \u662f\u4e00\u4e2a\u5bf9\u8c61\u7c7b\u578b<\/h2>\n
    \u5728 React Native \u4e2d\uff0c\u4e00\u4e2a\u6709\u8da3\u7684\u51b3\u5b9a\u662f src<\/code> \u7279\u6027\u5c06\u4f1a\u88ab\u547d\u540d\u4e3a source<\/code>\uff0c\u5e76\u4e14\u4e0d\u4f5c\u4e3a\u4e00\u4e2a\u5b57\u7b26\u4e32\u800c\u662f\u4e00\u4e2a uri<\/code> \u7279\u6027\u7684\u5bf9\u8c61\u7c7b\u578b\u3002<\/p>\n
    <Image source={{uri: 'something.jpg'}} \/><\/pre>\n
    \u7ad9\u5728\u5e95\u5c42\u6765\u770b\uff0c\u8fd9\u6837\u505a\u7684\u539f\u56e0\u662f\u5b83\u5141\u8bb8\u5c06\u5143\u6570\u636e\u4f9d\u9644\u5230\u8fd9\u4e2a\u5bf9\u8c61\u4e2d\u3002\u4e3e\u4e2a\u4f8b\u5b50\uff0c\u4f60\u6b63\u5728\u4f7f\u7528 require('image!icon')<\/code>\uff0c\u6211\u4eec\u5c06\u6dfb\u52a0 isStatic<\/code> \u4f5c\u4e3a\u4e00\u4e2a flag \u6765\u6807\u8bc6\u672c\u5730\u6587\u4ef6\uff08\u4e0d\u8981\u4f9d\u8d56\u8fd9\u4f8b\u5b50\uff0c\u5c06\u6765\u8fd9\u53ef\u80fd\u4f1a\u6539\u53d8\uff01\uff09\u3002\u8fd9\u5728\u5c06\u6765\u540c\u65f6\u4e5f\u4f1a\u6210\u4e3a\u53ef\u80fd\uff0c\u6bd4\u5982\u6211\u4eec\u53ef\u80fd\u4f1a\u652f\u6301\u5b50\u753b\u9762\uff0c\u5e76\u7528\u5b83\u6765\u53d6\u4ee3\u8f93\u51fa {uri: ...}<\/code>\uff0c\u6211\u4eec\u53ef\u4ee5\u8f93\u51fa {uri: ..., crop: {left: 10, top: 50, width: 20, height: 40}}<\/code> \u540c\u65f6\u652f\u6301\u5728\u6240\u6709\u5df2\u7ecf\u5b58\u5728\u7684\u7f51\u7ad9\u4e2d\u900f\u660e\u5730\u663e\u793a\u5b50\u753b\u9762\u3002<\/p>\n
    \u5728\u7528\u6237\u89d2\u5ea6\u4e0a\uff0c\u8fd9\u4f1a\u8ba9\u4f60\u7528\u6709\u7528\u7684\u7279\u6027\u6bd4\u5982\u56fe\u7247\u7684\u51e0\u4f55\u5c3a\u5bf8\u6765\u6ce8\u91ca\u5bf9\u8c61\u7c7b\u578b\uff0c\u4ece\u800c\u8ba1\u7b97\u51fa\u5c06\u8981\u663e\u793a\u51fa\u6765\u7684\u5c3a\u5bf8\u3002\u5c3d\u60c5\u5730\u4f7f\u7528\u8fd9\u79cd\u6570\u636e\u7c7b\u578b\u6765\u50a8\u5b58\u4f60\u7684\u56fe\u7247\u5427\u3002<\/p>\n
    \u80cc\u666f\u56fe\u7247\u53e0\u52a0<\/h2>\n
    \u4e00\u4e2a\u5bf9\u4e8e web \u5f00\u53d1\u8005\u4eec\u5f88\u5e38\u89c1\u7684\u9700\u6c42\u662f background-image<\/code>\u3002\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u521b\u5efa\u4e00\u4e2a\u7b80\u5355\u7684 <Image><\/code> \u7ec4\u4ef6\u7136\u540e\u5c06\u5b83\u4f5c\u4e3a\u5b50 layer \u6dfb\u52a0\u5230\u4f60\u60f3\u8981\u6dfb\u52a0\u7684 layer \u4e0a\u9762\u3002<\/p>\n
    return (  <Image source={...}>\n    <Text>Inside<\/Text>\n  <\/Image>);<\/pre>\n
    \u975e\u4e3b\u7ebf\u7a0b\u52a0\u8f7d<\/h2>\n
    \u56fe\u7247\u7684\u89e3\u6790\u4f1a\u82b1\u8d39\u5f88\u591a\u7684\u65f6\u95f4\u3002\u8fd9\u662f\u5bfc\u81f4\u7f51\u9875\u7684\u5e27\u6570\u4e0b\u964d\u7684\u5176\u4e2d\u4e00\u4e2a\u91cd\u8981\u7684\u539f\u56e0\uff0c\u56e0\u4e3a\u89e3\u6790\u5de5\u4f5c\u4f1a\u88ab\u6267\u884c\u5728\u4e3b\u7ebf\u7a0b\u4e2d\u3002\u5728 React Native \u4e2d\uff0c\u56fe\u7247\u7684\u89e3\u6790\u4f1a\u5728\u4e0d\u540c\u7684\u7ebf\u7a0b\u4e2d\u6267\u884c\u3002\u5728\u5b9e\u9645\u64cd\u4f5c\u4e2d\uff0c\u4f60\u5df2\u7ecf\u5904\u7406\u597d\u8fd9\u79cd\u60c5\u51b5\uff0c\u5f53\u56fe\u7247\u8fd8\u6ca1\u6709\u4e0b\u8f7d\u5b8c\u6210\uff0c\u56e0\u6b64\u9700\u8981\u5c06 placeholder \u663e\u793a\u51fa\u6765\uff0c\u8fd9\u4e0d\u7528\u4f60\u5199\u4efb\u4f55\u4ee3\u7801\u3002<\/p>\n
    \u4e3e\u4f8b<\/h3>\n
    'use strict';\n\nvar React = require('react-native');\nvar {\n  Image,\n  StyleSheet,\n  Text,\n  View,\n  ActivityIndicatorIOS\n} = React;\n\nvar ImageCapInsetsExample = require('.\/ImageCapInsetsExample');\n\nvar NetworkImageExample = React.createClass({\n  watchID: (null: ?number),\n\n  getInitialState: function() {    return {\n      error: false,\n      loading: false,\n      progress: 0\n    };\n  },\n  render: function() {\n    var loader = this.state.loading ?\n      <View style={styles.progress}>\n        <Text>{this.state.progress}%<\/Text>\n        <ActivityIndicatorIOS style={{marginLeft:5}}\/>\n      <\/View> : null;    return this.state.error ?\n      <Text>{this.state.error}<\/Text> :\n      <Image\n        source={this.props.source}\n        style={[styles.base, {overflow: 'visible'}]}\n        onLoadStart={(e) => this.setState({loading: true})}\n        onError={(e) => this.setState({error: e.nativeEvent.error, loading: false})}\n        onProgress={(e) => this.setState({progress: Math.round(100 * e.nativeEvent.loaded \/ e.nativeEvent.total)})}\n        onLoad={() => this.setState({loading: false, error: false})}>\n        {loader}\n      <\/Image>;\n  }\n});\n\nexports.displayName = (undefined: ?string);\nexports.framework = 'React';\nexports.title = '<Image>';\nexports.description = 'Base component for displaying different types of images.';\n\nexports.examples = [\n  {\n    title: 'Plain Network Image',\n    description: 'If the `source` prop `uri` property is prefixed with ' +    '\"http\", then it will be downloaded from the network.',\n    render: function() {      return (\n        <Image\n          source={{uri: 'http:\/\/facebook.github.io\/react\/img\/logo_og.png'}}\n          style={styles.base}\n        \/>\n      );\n    },\n  },\n  {\n    title: 'Plain Static Image',\n    description: 'Static assets should be required by prefixing with `image!` ' +      'and are located in the app bundle.',\n    render: function() {      return (\n        <View style={styles.horizontal}>\n          <Image source={require('image!uie_thumb_normal')} style={styles.icon} \/>\n          <Image source={require('image!uie_thumb_selected')} style={styles.icon} \/>\n          <Image source={require('image!uie_comment_normal')} style={styles.icon} \/>\n          <Image source={require('image!uie_comment_highlighted')} style={styles.icon} \/>\n        <\/View>\n      );\n    },\n  },\n  {\n    title: 'Error Handler',\n    render: function() {      return (\n        <NetworkImageExample source={{uri: 'http:\/\/TYPO_ERROR_facebook.github.io\/react\/img\/logo_og.png'}} \/>\n      );\n    },\n    platform: 'ios',\n  },\n  {\n    title: 'Image Download Progress',\n    render: function() {      return (\n        <NetworkImageExample source={{uri: 'http:\/\/facebook.github.io\/origami\/public\/images\/blog-hero.jpg?r=1'}}\/>\n      );\n    },\n    platform: 'ios',\n  },\n  {\n    title: 'Border Color',\n    render: function() {      return (\n        <View style={styles.horizontal}>\n          <Image\n            source={smallImage}\n            style={[\n              styles.base,\n              styles.background,\n              {borderWidth: 3, borderColor: '#f099f0'}\n            ]}\n          \/>\n        <\/View>\n      );\n    },\n    platform: 'ios',\n  },\n  {\n    title: 'Border Width',\n    render: function() {      return (\n        <View style={styles.horizontal}>\n          <Image\n            source={smallImage}\n            style={[\n              styles.base,\n              styles.background,\n              {borderWidth: 5, borderColor: '#f099f0'}\n            ]}\n          \/>\n        <\/View>\n      );\n    },\n    platform: 'ios',\n  },\n  {\n    title: 'Border Radius',\n    render: function() {      return (\n        <View style={styles.horizontal}>\n          <Image\n            style={[styles.base, {borderRadius: 5}]}\n            source={fullImage}\n          \/>\n          <Image\n            style={[styles.base, styles.leftMargin, {borderRadius: 19}]}\n            source={fullImage}\n          \/>\n        <\/View>\n      );\n    },\n  },\n  {\n    title: 'Background Color',\n    render: function() {      return (\n        <View style={styles.horizontal}>\n          <Image source={smallImage} style={styles.base} \/>\n          <Image\n            style={[\n              styles.base,\n              styles.leftMargin,\n              {backgroundColor: 'rgba(0, 0, 100, 0.25)'}\n            ]}\n            source={smallImage}\n          \/>\n          <Image\n            style={[styles.base, styles.leftMargin, {backgroundColor: 'red'}]}\n            source={smallImage}\n          \/>\n          <Image\n            style={[styles.base, styles.leftMargin, {backgroundColor: 'black'}]}\n            source={smallImage}\n          \/>\n        <\/View>\n      );\n    },\n  },\n  {\n    title: 'Opacity',\n    render: function() {      return (\n        <View style={styles.horizontal}>\n          <Image\n            style={[styles.base, {opacity: 1}]}\n            source={fullImage}\n          \/>\n          <Image\n            style={[styles.base, styles.leftMargin, {opacity: 0.8}]}\n            source={fullImage}\n          \/>\n          <Image\n            style={[styles.base, styles.leftMargin, {opacity: 0.6}]}\n            source={fullImage}\n          \/>\n          <Image\n            style={[styles.base, styles.leftMargin, {opacity: 0.4}]}\n            source={fullImage}\n          \/>\n          <Image\n            style={[styles.base, styles.leftMargin, {opacity: 0.2}]}\n            source={fullImage}\n          \/>\n          <Image\n            style={[styles.base, styles.leftMargin, {opacity: 0}]}\n            source={fullImage}\n          \/>\n        <\/View>\n      );\n    },\n  },\n  {\n    title: 'Nesting',\n    render: function() {      return (\n        <Image\n          style={{width: 60, height: 60, backgroundColor: 'transparent'}}\n          source={fullImage}>\n          <Text style={styles.nestedText}>\n            React\n          <\/Text>\n        <\/Image>\n      );\n    },\n  },\n  {\n    title: 'Tint Color',\n    description: 'The `tintColor` style prop changes all the non-alpha ' +      'pixels to the tint color.',\n    render: function() {      return (\n        <View>\n          <View style={styles.horizontal}>\n            <Image\n              source={require('image!uie_thumb_normal')}\n              style={[styles.icon, {borderRadius: 5, tintColor: '#5ac8fa' }]}\n            \/>\n            <Image\n              source={require('image!uie_thumb_normal')}\n              style={[styles.icon, styles.leftMargin, {borderRadius: 5, tintColor: '#4cd964' }]}\n            \/>\n            <Image\n              source={require('image!uie_thumb_normal')}\n              style={[styles.icon, styles.leftMargin, {borderRadius: 5, tintColor: '#ff2d55' }]}\n            \/>\n            <Image\n              source={require('image!uie_thumb_normal')}\n              style={[styles.icon, styles.leftMargin, {borderRadius: 5, tintColor: '#8e8e93' }]}\n            \/>\n          <\/View>\n          <Text style={styles.sectionText}>\n            It also works with downloaded images:\n          <\/Text>\n          <View style={styles.horizontal}>\n            <Image\n              source={smallImage}\n              style={[styles.base, {borderRadius: 5, tintColor: '#5ac8fa' }]}\n            \/>\n            <Image\n              source={smallImage}\n              style={[styles.base, styles.leftMargin, {borderRadius: 5, tintColor: '#4cd964' }]}\n            \/>\n            <Image\n              source={smallImage}\n              style={[styles.base, styles.leftMargin, {borderRadius: 5, tintColor: '#ff2d55' }]}\n            \/>\n            <Image\n              source={smallImage}\n              style={[styles.base, styles.leftMargin, {borderRadius: 5, tintColor: '#8e8e93' }]}\n            \/>\n          <\/View>\n        <\/View>\n      );\n    },\n  },\n  {\n    title: 'Resize Mode',\n    description: 'The `resizeMode` style prop controls how the image is ' +      'rendered within the frame.',\n    render: function() {      return (\n        <View style={styles.horizontal}>\n          <View>\n            <Text style={[styles.resizeModeText]}>\n              Contain\n            <\/Text>\n            <Image\n              style={styles.resizeMode}\n              resizeMode={Image.resizeMode.contain}\n              source={fullImage}\n            \/>\n          <\/View>\n          <View style={styles.leftMargin}>\n            <Text style={[styles.resizeModeText]}>\n              Cover\n            <\/Text>\n            <Image\n              style={styles.resizeMode}\n              resizeMode={Image.resizeMode.cover}\n              source={fullImage}\n            \/>\n          <\/View>\n          <View style={styles.leftMargin}>\n            <Text style={[styles.resizeModeText]}>\n              Stretch\n            <\/Text>\n            <Image\n              style={styles.resizeMode}\n              resizeMode={Image.resizeMode.stretch}\n              source={fullImage}\n            \/>\n          <\/View>\n        <\/View>\n      );\n    },\n  },\n  {\n    title: 'Animated GIF',\n    render: function() {      return (\n        <Image\n          style={styles.gif}\n          source={{uri: 'http:\/\/38.media.tumblr.com\/9e9bd08c6e2d10561dd1fb4197df4c4e\/tumblr_mfqekpMktw1rn90umo1_500.gif'}}\n        \/>\n      );\n    },\n    platform: 'ios',\n  },\n  {\n    title: 'Cap Insets',\n    description:      'When the image is resized, the corners of the size specified ' +      'by capInsets will stay a fixed size, but the center content and ' +      'borders of the image will be stretched. This is useful for creating ' +      'resizable rounded buttons, shadows, and other resizable assets.',\n    render: function() {      return <ImageCapInsetsExample \/>;\n    },\n    platform: 'ios',\n  },\n];\n\nvar fullImage = {uri: 'http:\/\/facebook.github.io\/react\/img\/logo_og.png'};\nvar smallImage = {uri: 'http:\/\/facebook.github.io\/react\/img\/logo_small_2x.png'};\n\nvar styles = StyleSheet.create({\n  base: {\n    width: 38,\n    height: 38,\n  },\n  progress: {\n    flex: 1,\n    alignItems: 'center',\n    flexDirection: 'row',\n    width: 100\n  },\n  leftMargin: {\n    marginLeft: 10,\n  },\n  background: {\n    backgroundColor: '#222222'\n  },\n  sectionText: {\n    marginVertical: 6,\n  },\n  nestedText: {\n    marginLeft: 12,\n    marginTop: 20,\n    backgroundColor: 'transparent',\n    color: 'white'\n  },\n  resizeMode: {\n    width: 90,\n    height: 60,\n    borderWidth: 0.5,\n    borderColor: 'black'\n  },\n  resizeModeText: {\n    fontSize: 11,\n    marginBottom: 3,\n  },\n  icon: {\n    width: 15,\n    height: 15,\n  },\n  horizontal: {\n    flexDirection: 'row',\n  },\n  gif: {\n    flex: 1,\n    height: 200,\n  },\n});<\/pre>\n
    <\/p>\n","protected":false},"excerpt":{"rendered":"
    \u4e00\u4e2a react \u7684\u7ec4\u4ef6\u7528\u4ee5\u663e\u793a\u4e0d\u540c\u7c7b\u578b\u7684\u56fe\u7247\uff0c\u5305\u62ec\u7f51\u7edc\u56fe\u7247\uff0c\u9759\u6001\u8d44\u6e90\uff0c\u4e34\u65f6\u7684\u672c\u5730\u56fe\u7247\uff0c\u8fd8\u6709\u672c\u5730\u78c1\u76d8\u7684\u56fe\u7247\uff0c\u6bd4 […]<\/p>\n","protected":false},"author":1,"featured_media":190990,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[182398],"tags":[],"class_list":["post-190989","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mini-program"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/190989","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/comments?post=190989"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/190989\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media\/190990"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=190989"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=190989"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=190989"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}