1.引入头文件:
#import<AVFoundation/AVFoundation.h>
#import<AssetsLibrary/AssetsLibrary.h>
2.查看是否有权限
查看相册权限
ALAuthorizationStatus author = [ALAssetsLibrary authorizationStatus]; author有四种状态;
查看麦克风,摄像头权限
AVAuthorizationStatus authStatus = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo];
代码3.跳转到设置页面设置权限
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"APP-Prefs:root=Privacy"]];
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