人脸检测主线程返回，定时器放到主线程

Author: 敛心

IOS/SDK/LuaViewSDK/Classes/lvsdk/LVCamera.m

@@ -193,7 +193,9 @@ - (void)captureOutput:(AVCaptureOutput *)output didOutputMetadataObjects:(NSArra
         for (AVMetadataObject *metadata in metadataObjects){
             if ([metadata.type isEqualToString:AVMetadataObjectTypeFace]){
                 CGRect face = [self.previewLayer rectForMetadataOutputRectOfInterest:metadata.bounds];
-                [self onFaceDetected:face];
+                dispatch_async(dispatch_get_main_queue(), ^{
+                    [self onFaceDetected:face];
+                });
 #ifdef DEBUG
                 CGPathAddRect(path, NULL, face);
 #endif

IOS/SDK/LuaViewSDK/Classes/lvsdk/LVTimer.m

@@ -63,10 +63,10 @@ -(void) startTimer{
     if( self.delay>0 ) {
         NSDate* date = [[NSDate alloc] initWithTimeIntervalSinceNow:self.delay];
         timer = [[NSTimer alloc] initWithFireDate:date interval:self.interval target:self selector:@selector(timerCallBack) userInfo:nil repeats:self.repeat];
-        [[NSRunLoop currentRunLoop] addTimer:timer forMode:NSRunLoopCommonModes];
+        [[NSRunLoop mainRunLoop] addTimer:timer forMode:NSRunLoopCommonModes];
     } else {
         timer = [NSTimer scheduledTimerWithTimeInterval:self.interval target:self selector:@selector(timerCallBack) userInfo:nil repeats:self.repeat];
-        [[NSRunLoop currentRunLoop] addTimer:timer forMode:NSRunLoopCommonModes];
+        [[NSRunLoop mainRunLoop] addTimer:timer forMode:NSRunLoopCommonModes];
     }
 }