摘要：
NSTimer *timer = [[NSTimer alloc]initWithFireDate:[NSDate distantPast] interval:1 target:self selector:@selector(timerAction:) userInfo:nil repeats:YE 阅读全文
摘要：
我们在开发当中经常会遇到手机升级后，xcode没升级提示要xcode升级才能运行 …………which may not be supported by this version of Xcode. An updated version of Xcode may be found on the. 解决方 阅读全文