• 相冊(cè)授權(quán)判斷

// 判斷授權(quán)狀態(tài)
        PHAuthorizationStatus status = [PHPhotoLibrary authorizationStatus];
        if (status == PHAuthorizationStatusRestricted) { // 此應(yīng)用程序沒(méi)有被授權(quán)訪問(wèn)的照片數(shù)據(jù)。可能是家長(zhǎng)控制權(quán)限。
            NSLog(@"因?yàn)橄到y(tǒng)原因, 無(wú)法訪問(wèn)相冊(cè)");
        } else if (status == PHAuthorizationStatusDenied) { // 用戶(hù)拒絕訪問(wèn)相冊(cè)
            UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"警告" message:@"請(qǐng)去-> [設(shè)置 - 隱私 - 相機(jī) - 項(xiàng)目名稱(chēng)] 打開(kāi)訪問(wèn)開(kāi)關(guān)" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"去設(shè)置", nil];
            [alertView show];
        } else if (status == PHAuthorizationStatusAuthorized) { // 用戶(hù)允許訪問(wèn)相冊(cè)
            // 放一些使用相冊(cè)的代碼
        } else if (status == PHAuthorizationStatusNotDetermined) { // 用戶(hù)還沒(méi)有做出選擇
            // 彈框請(qǐng)求用戶(hù)授權(quán)
            [PHPhotoLibrary requestAuthorization:^(PHAuthorizationStatus status) {
                if (status == PHAuthorizationStatusAuthorized) { // 用戶(hù)點(diǎn)擊了好
                  // 放一些使用相冊(cè)的代碼
                }
            }];
        }

• 相機(jī)授權(quán)判斷

// 1、 獲取攝像設(shè)備
    AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
    if (device) {
        // 判斷授權(quán)狀態(tài)
        AVAuthorizationStatus authStatus = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo];
        if (authStatus == AVAuthorizationStatusRestricted) {
            NSLog(@"因?yàn)橄到y(tǒng)原因, 無(wú)法訪問(wèn)相機(jī)");
            return;
        } else if (authStatus == AVAuthorizationStatusDenied) { // 用戶(hù)拒絕當(dāng)前應(yīng)用訪問(wèn)相機(jī)
            UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"警告" message:@"請(qǐng)去-> [設(shè)置 - 隱私 - 相機(jī) - 項(xiàng)目名稱(chēng)] 打開(kāi)訪問(wèn)開(kāi)關(guān)" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"去設(shè)置", nil];
            [alertView show];
            return;
        } else if (authStatus == AVAuthorizationStatusAuthorized) { // 用戶(hù)允許當(dāng)前應(yīng)用訪問(wèn)相機(jī)
            SGScanningQRCodeVC *scanningQRCodeVC = [[SGScanningQRCodeVC alloc] init];
            scanningQRCodeVC.delegate = self;
            [self presentViewController:scanningQRCodeVC animated:YES completion:nil];
        } else if (authStatus == AVAuthorizationStatusNotDetermined) { // 用戶(hù)還沒(méi)有做出選擇
            // 彈框請(qǐng)求用戶(hù)授權(quán)
            [AVCaptureDevice requestAccessForMediaType:AVMediaTypeVideo completionHandler:^(BOOL granted) {
                if (granted) {
                    // 用戶(hù)接受
                    SGScanningQRCodeVC *scanningQRCodeVC = [[SGScanningQRCodeVC alloc] init];
                    scanningQRCodeVC.delegate = self;
                    [self presentViewController:scanningQRCodeVC animated:YES completion:nil];
                }
            }];
        }
    } else {
        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"警告" message:@"未檢測(cè)到您的攝像頭, 請(qǐng)?jiān)谡鏅C(jī)上測(cè)試" delegate:self cancelButtonTitle:@"好的" otherButtonTitles:nil, nil];
        [alertView show];
    }

• UIAlertView的代理方法——跳轉(zhuǎn)到系統(tǒng)設(shè)置的隱私中開(kāi)啟授權(quán)

#pragma mark - UIAlertViewDelegate
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
    if (buttonIndex == 1) {
        // 系統(tǒng)是否大于10
        NSURL *url = nil;
        if ([[UIDevice currentDevice] systemVersion].floatValue < 10.0) {
            url = [NSURL URLWithString:@"prefs:root=privacy"];
            
        } else {
            url = [NSURL URLWithString:UIApplicationOpenSettingsURLString];
        }
        [[UIApplication sharedApplication] openURL:url];
    }
}