OC中多线程的创建方法

方法一:
NSThread *t = [[NSThread alloc] initWithTarget:self selector:@selector(mutableThread) object:nil];
方法二：
[NSThread detachNewThreadSelector:@selector(mutableThread) toTarget:self withObject:nil];
方法三：
[self performSelectorInBackground:@selector(mutableThread) withObject:nil];
方法四：多线程blog创建

NSOperationQueue *operationQueue = [[NSOperationQueue alloc] init]; 

 //会开启一个多线程 

 [operationQueue addOperationWithBlock:^{ 

for(int i = 0; i < 50 ;i++) 

{ 

NSLog(@"多线程:%d",i); 

} 

 }];

方法五：

//相当于是一个线程池 

 NSOperationQueue *operationQueue = [[NSOperationQueue alloc] init]; 

 operationQueue.maxConcurrentOperationCount = 1;//设置并发数 

 //创建线程 

 NSInvocationOperation *opertion1 = [[NSInvocationOperation alloc] initWithTarget:self selector:@selector(thread1) object:nil]; 

 //设置线程的优先级 

 [opertion1 setQueuePriority:NSOperationQueuePriorityVeryLow]; 

 //创建另一个线程 

 NSInvocationOperation *opertion2 = [[NSInvocationOperation alloc] initWithTarget:self selector:@selector(thread2) object:nil]; 

 [opertion2 setQueuePriority:NSOperationQueuePriorityHigh];

方法六：

dispatch_queue_t queue = dispatch_queue_create("test",NULL); 

 dispatch_async(queue,^{ 

for(int i=0;i<50;i++) 

{ 

NSLog(@"多线程：%d",i); 
  

 });