如何检测两种不同的权限[重复]

Question

这个问题在这里已有答案：

• Getting a “This application is modifying the autolayout engine from a background thread” error? 19个答案

我有一个用于初始麦克风的检测权限代码，然后是用于打开新视图的语音识别。但是下面的代码创建了一个错误，例如“此应用程序在从主线程访问引擎后从后台线程修改自动布局引擎。这可能导致引擎损坏和奇怪的崩溃。”

谁能有任何想法吗？

 if (@available(iOS 10.0, *)) {
    [[AVAudioSession sharedInstance] requestRecordPermission:^(BOOL granted) {
        if (granted) {
         //   [self detechUserSpeechPermission];
       //     [self configureSpeechToTextView];
            [SFSpeechRecognizer requestAuthorization:^(SFSpeechRecognizerAuthorizationStatus status) {
                switch (status) {
                    case SFSpeechRecognizerAuthorizationStatusAuthorized:
                        [self configureSpeechToTextView];
                        break;
                    case SFSpeechRecognizerAuthorizationStatusDenied:
                        [self warnUserForSpeechPermission];
                        break;
                    case SFSpeechRecognizerAuthorizationStatusNotDetermined:
                        [self warnUserForSpeechPermission];
                        break;
                    case SFSpeechRecognizerAuthorizationStatusRestricted:
                        [self warnUserForSpeechPermission];
                        break;
                    default: break;
                } }];
        }
        else {
            [self warnUserForMicrophonePermission];
        }
    }];
} else {
    NSLog(@"low ios version");
}

Answer 1

尝试在主线程上调用方法，如下面的代码：

dispatch_async(dispatch_get_main_queue(), ^{
  [self configureSpeechToTextView];
});