检测媒体库ios的权限 [英] Detect permission of media library ios

问题描述

在我的应用中，我想检测一下，如果用户是否允许他的媒体库。当系统弹出询问或稍后设置时，用户可能会拒绝媒体库权限。有没有办法检测媒体库权限的状态？

In my app, I want to detect that if user give the permission to his media library or not. User may denied media library permission when system popup ask or later from setting. Is there any way to detect the status of media library permission?

这是我的代码，可以访问歌曲列表。

Here is my code that access list of songs.

MPMediaQuery *everything = [MPMediaQuery songsQuery];
NSArray *songArray = [everything items];

请参阅下面的屏幕截图，用户可以更改媒体库权限。

Please see below screenshot where user can change Media Library permissions.

推荐答案

-(void) checkMediaLibraryPermissions {
    [MPMediaLibrary requestAuthorization:^(MPMediaLibraryAuthorizationStatus status){
        switch (status) {
            case MPMediaLibraryAuthorizationStatusNotDetermined: {
                // not determined
                break;
            }
            case MPMediaLibraryAuthorizationStatusRestricted: {
                // restricted
                break;
            }
            case MPMediaLibraryAuthorizationStatusDenied: {
                // denied
                break;
            }
            case MPMediaLibraryAuthorizationStatusAuthorized: {
                // authorized
                break;
            }
            default: {
                break;
            }
        }
    }];
}

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