IOS10 相册相机闪退bug解决办法

ios10系统下调用系统相册、相机功能，遇到闪退的情况，描述如下：

this app has crashed because it attempted to access privacy-sensitive data without 
a usage description.the app's info.plist must contain an nsphotolibraryusagedescription
 key with a string value explaining to the user how the app uses this data.

修复方法：

在info.plist文件下添加

相机权限

<key>nscamerausagedescription</key>

<string>cameradesciption</string>

相册权限

<key>nsphotolibraryusagedescription</key>

<string>photolibrarydesciption</string>

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