如下图，即使图片尺寸不规范，xcode5也可以正常预览(这里我提供的尺寸是57*57, 而需要的是120*120)
![xcode5 asset catalogs 由于图标尺寸错误导致编译问题解决[原创]](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdllteHZaeTV2WW1wall5NWpiMjB2ZDNBdFkyOXVkR1Z1ZEM5MWNHeHZZV1J6THpJd01UTXZNVEV2WVhCd2FXTnZiaTB4TFRNd01IZzVOQzV3Ym1jPS5qcGc%3D.jpg?w=700&webp=1 "xcode5 asset catalogs 由于图标尺寸错误导致编译问题解决[原创]")
但编译运行失败，报的错是：
Images.xcassets: error: The app icon set named "AppIcon" did not have any applicable content.
Images.xcassets:./AppIcon.appiconset/[iphone][60x60][2x]: warning: AppIcon.appiconset/Icon.png is 57x57 but should be 120x120.
Images.xcassets:./AppIcon.appiconset/[iphone][60x60][2x]: warning: AppIcon.appiconset/Icon.png is 57x57 but should be 120x120.
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Images.xcassets: error: The app icon set named "AppIcon" did not have any applicable content.
Images.xcassets:./AppIcon.appiconset/[iphone][60x60][2x]: warning: AppIcon.appiconset/Icon.png is 57x57 but should be 120x120.
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![xcode5 asset catalogs 由于图标尺寸错误导致编译问题解决[原创]](https://image.shishitao.com:8440/aHR0cHM6Ly9iYnNtYXguaWthZmFuLmNvbS9zdGF0aWMvTDNCeWIzaDVMMmgwZEhBdllteHZaeTV2WW1wall5NWpiMjB2ZDNBdFkyOXVkR1Z1ZEM5MWNHeHZZV1J6THpJd01UTXZNVEV2WVhCd2FXTnZiaTB5TFRNd01IZ3hORFV1Y0c1bi5qcGc%3D.jpg?w=700&webp=1 "xcode5 asset catalogs 由于图标尺寸错误导致编译问题解决[原创]")
遇到这种错误需要按规范替换图片资源文件即可。
iOS7要求的图标尺寸与iOS6等老版本比较有些变化，包括iPhone和iPad，尺寸都有增加，各图标尺寸具体数值可参见官网的iOS App编程指南。