65 多线程NSThread使用

转载:http://www.cnblogs.com/wzh521/p/4823379.html

NSThread创建方式:
      方式一：利用perform开启多线程，并且执行方法threadAction
 2    [self performSelectorInBackground:@selector(threadAction) withObject:@"thread"];
 3     
 4    方式二：
 5     NSThread *thread = [[NSThread alloc] initWithTarget:self selector:@selector(threadAction:) object:@"text"];
 6      thread.name = @"thread1";
 7     //开启线程
 8     [thread start];
 9     
10     //方式三:开启新的线程，并且执行
11     [NSThread detachNewThreadSelector:@selector(threadAction:) toTarget:self withObject:@"thread2"];

 1 //获取当前线程
 2 NSThread *thread = [NSThread currentThread];
 3 //判断当前是否在多线程
 4 [NSThread isMultiThreaded]
 5 //判断当前是否在主线程
 6 [NSThread isMainThread]
 7 //让当前线程睡眠几秒
 8 [NSThread sleepForTimeInterval:3];
 9 //回到主线程
10 //    [self performSelectorOnMainThread:<#(SEL)#> withObject:<#(id)#> waitUntilDone:<#(BOOL)#>]