fix: return when videoItem is nil in startAnimation.

errnull · errnull · commit cb27f0f937e8 · 2019-04-07T17:43:21.000+08:00
diff --git a/Source/SVGAPlayer.m b/Source/SVGAPlayer.m
@@ -54,6 +54,10 @@ - (void)willMoveToSuperview:(UIView *)newSuperview {
 }
 
 - (void)startAnimation {
+    if (self.videoItem == nil) {
+        NSLog(@"videoItem could not be nil！");
+        return;
+    }
     [self stopAnimation:NO];
     self.loopCount = 0;
     self.displayLink = [CADisplayLink displayLinkWithTarget:self selector:@selector(next)];
