fix the problem:repeatedly stop cause app crash

bec3479f · panxiaochun · f888f471 · bec3479f
Commit bec3479f authored Oct 28, 2016 by panxiaochun
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cap_ios_video_camera.mm modules/videoio/src/cap_ios_video_camera.mm +2 -0

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--- a/modules/videoio/src/cap_ios_video_camera.mm
+++ b/modules/videoio/src/cap_ios_video_camera.mm
@@ -129,6 +129,7 @@ static CGFloat DegreesToRadians(CGFloat degrees) {return degrees * M_PI / 180;}

 - (void)stop;
 {
+    if (self.running == YES) {
        [super stop];

        [videoDataOutput release];
@@ -155,6 +156,7 @@ static CGFloat DegreesToRadians(CGFloat degrees) {return degrees * M_PI / 180;}
            [self.customPreviewLayer removeFromSuperlayer];
            self.customPreviewLayer = nil;
        }
+    }
 }

 // TODO fix