//从子线程中回归到主线程中去执行selector方法
[self performSelectorOnMainThread:@selector(updateUI:) withObject:image waitUntilDone:NO]; [self perform
[self performSelectorOnMainThread:@selector(updateUI:) withObject:image waitUntilDone:NO]; [self perform
阅读背景：
从子线程中回归到主线程中去执行selector方法
来源：互联网
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