This app has crashed because it attempted to access privacy-sensitive data without a usage description. The app's Info.plist must contain an（报错的权限KEY） NSPhotoLibraryUsageDescription key with a string value explaining to the user how the app uses this data.
控制台打印类似的报错信息都是因为权限问题，没有经过用户许可使用某些权限，如相机。。
解决方案
打开info.plist
添加一个选项
键 - NSPhotoLibraryUsageDescription
值 String- 随意填写会显示在第一次调用次权限的alert view的子标题中。打开info.plist source code
添加一下键值对
<key>NSPhotoLibraryUsageDescription</key>
<string>App 需要您的同意才能读取媒体资料库</string>
