关于NSThred开启多线程的方法
- (void)performSelectorInBackground:(SEL)aSelector withObject:(id)arg
[self performSelectorInBackground:@selector(doSomething) withObject:nil];
这个方法是开启另一个线程,在 doSomething 方法中用于处理耗时的操作
当需要UI刷新处理的时候要回到主线程:
- (void)performSelectorOnMainThread:(SEL)aSelector withObject:(id)arg waitUntilDone:(BOOL)wait;
// UI刷新 [self performSelectorOnMainThread:@selector(refreshUI) withObject:nil waitUntilDone:NO];
或者
// UI刷新 dispatch_async(dispatch_get_main_queue(), ^{ NSLog(@"refreshUI"); });