OC dispatch_after
__weak typeof(self) weakSelf = self;
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.5 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^
{
__strong typeof(self) pThis = weakSelf;
[pThis.backgroundView removeFromSuperview];
pThis.backgroundView = nil;
});
Swift DispatchQueue.main.asyncAfte
DispatchQueue.main.asyncAfter(deadline: .now()+0.5, execute:
{
self.backgroundView()?.removeFromSuperview()
self.setBackgroundView(backgroundView: nil)
})
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https://github.com/wangrui460/WRNavigationBar_swift
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