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>
