//相册权限

NSInteger status = [self.classauthorizationStatus];

if (status == 0) {

/**

* 当某些情况下AuthorizationStatus == AuthorizationStatusNotDetermined时，无法弹出系统首次使用的授权alertView，系统应用设置里亦没有相册的设置，此时将无法使用，故作以下操作，弹出系统首次使用的授权alertView

*/

[selfrequestAuthorizationWithCompletion:nil];

}

- (void)requestAuthorizationWithCompletion:(void (^)())completion {

void (^callCompletionBlock)() = ^(){

dispatch_async(dispatch_get_main_queue(), ^{

if (completion) {

completion();

}

});

};

if (iOS8Later) {

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT,0), ^{

[PHPhotoLibraryrequestAuthorization:^(PHAuthorizationStatus status) {

callCompletionBlock();

}];

});

} else {

[self.assetLibraryenumerateGroupsWithTypes:ALAssetsGroupAllusingBlock:^(ALAssetsGroup *group,BOOL *stop) {

callCompletionBlock();

} failureBlock:^(NSError *error) {

callCompletionBlock();

}];

}

}

当  status = 3;是用户点击了允许，是默认可以的。

其他值的时候如下：

当不是允许的时候这个时候，我们就可以做到与系统一样的效果了，甚至比它的效果还要好，上面的代码即可提示了，

我们还可以加一些其他的操作，当选择允许的时候，那就开始你之前的代码直接进入相册，不是选择允许的话，我们就可以写个界面加个跳转，效果可能会更好

NSString *appName = [infoDict valueForKey:@"CFBundleDisplayName"];

if (!appName) appName = [infoDict valueForKey:@"CFBundleName"];

NSString *tipText = [NSStringstringWithFormat:[NSBundletz_localizedStringForKey:@"Allow %@ to access your album in \"Settings -> Privacy -> Photos\""],appName];

_tipLabel.text = tipText;

[PhotobgViewaddSubview:_tipLabel];

NSString *settingBtnTitleStr = [NSBundletz_localizedStringForKey:@"Setting"];

if (iOS8Later) {

_settingBtn = [UIButtonbuttonWithType:UIButtonTypeSystem];

[_settingBtn setTitle:settingBtnTitleStr forState:UIControlStateNormal];

_settingBtn.frame =CGRectMake(0,180, self.view.tz_width,44);

_settingBtn.titleLabel.font = [UIFontsystemFontOfSize:18];

[_settingBtnaddTarget:selfaction:@selector(settingBtnClick)forControlEvents:UIControlEventTouchUpInside];

[PhotobgViewaddSubview:_settingBtn];

}

_timer = [NSTimerscheduledTimerWithTimeInterval:0.2target:selfselector:@selector(observeAuthrizationStatusChange)userInfo:nilrepeats:YES];

这个是跳转到相册权限

[[UIApplication sharedApplication]openURL:[NSURLURLWithString:UIApplicationOpenSettingsURLString]];

而我加一个时钟是为了时时刻刻监听相册权限，一旦打开，立刻把自己写的东西移除了。

if ([[TZImageManagermanager] authorizationStatusAuthorized]) {}

这里面操作，直接进入相册了。

大致思路就是这个，我把效果图截图一下：