performSelectorOnMainThread
2012-11-22 14:23
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iphone开发中,在主线程之外的线程更新主线程所显示的界面元素,不能直接调用主线程的类的更新界面的方法,否则界面看不到任何结果.而是需要有个缓冲,叫做performSelectorOnMainThread.
使用方法是,在线程调用到更新界面那个类的时候,在更新界面前,通过如下调用.
[self performSelectorOnMainThread:@selector(updateLabel:) withObject:updateData waitUntilDone:YES];
比如说你已经定义了一个- (void)updateLabel:(NSString *)txt{}的方法.在此方法中更新界面即可.即时看到结果.
使用方法是,在线程调用到更新界面那个类的时候,在更新界面前,通过如下调用.
[self performSelectorOnMainThread:@selector(updateLabel:) withObject:updateData waitUntilDone:YES];
比如说你已经定义了一个- (void)updateLabel:(NSString *)txt{}的方法.在此方法中更新界面即可.即时看到结果.
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