Objective-c中线程NSThread的使用

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NSThread使用

1.创建并启动线程

 

thread = [[NSThread alloc]initWithTarget:self selector:@selector(startMonitor) object:nil];  
[thread start]; 

  

2.停止线程

    先向线程发送cancel消息，将线程标记为停止，然后在合适的地方判断线程是否标记为退出，如果是，则发送exit消息，真正退出线程

 

- (void)getInfo:(id)sender  
{    
    if (!running) {  
        NSLog(@"start monitor");  
        thread = [[NSThread alloc]initWithTarget:self selector:@selector(startMonitor) object:nil];  
        [thread start];  
        running = true;  
    }  
    else{  
        NSLog(@"stop monitor");  
        [thread cancel];  
        running = false;  
    }  
}  
  
- (void) startMonitor  
{  
    while (true) {  
        if ([[NSThread currentThread] isCancelled]) {  
            [NSThread exit];  
        }  
        //do your things here  
        sleep(1);  
    };  
}