首页 / 移动开发 / IOS / iOS实现代码只执行一次

- （void）viewDidLoad {[super viewDidLoad];// Do any additional setup after loading the view, typically from a nib. [self performSelector:@selector（wangmumu:） withObject:@"100" afterDelay:1];} - （void） wangmumu:（NSString *）han{static dispatch_once_t hanwanjie;//只执行一次dispatch_once（&hanwanjie, ^{NSLog（@"12345678910"）;}）; int niha = [han intValue] - 1;if （niha == 10） {return;}[self performSelector:@selector（hanwanjie:） withObject:[NSString stringWithFormat:@"%d",niha] afterDelay:1];}