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转自[https://blog.csdn.net/ericshen880412/article/details/107208149?spm=1001.2014.3001.55...
NSTimer 循环引用问题 使用此方法创建,会形成循环引用,即使在dealloc中调用[self.timer invalidate]以及self.timer = nil;也...
为什么不执行test方法 ?performSelector :withObject:afterDelay: 本质是一个定时器,且当前在子线程执行performSelector...