iOS开发多线程-线程间通讯

 1 - (void)demoAboutNSThread
 2 {
 3     NSLog(@"demoAboutNSThread %@", [NSThread currentThread]);
 4     NSThread * thread = [[NSThread alloc] initWithTarget:self selector:@selector(longTimeOperation) object:nil];
 5     [thread start];
 6 }
 7 
 8 - (void)longTimeOperation
 9 {
10      NSLog(@"longTimeOperation %@", [NSThread currentThread]);
11     [self performSelectorOnMainThread:@selector(mainThreadOperation) withObject:nil waitUntilDone:NO];
12 }
13 
14 - (void)mainThreadOperation
15 {
16     NSLog(@"mainThreadOperation %@",[NSThread currentThread]);
17 }

 1 - (void)dispatchDemo
 2 {
 3     NSLog(@" start %@",[NSThread currentThread]);
 4     
 5     dispatch_async(dispatch_get_global_queue(0, 0), ^{
 6         NSLog(@" 耗时从左 %@",[NSThread currentThread]);
 7         
 8         dispatch_sync(dispatch_get_main_queue(), ^{
 9             NSLog(@" 回到主线程 %@", [NSThread currentThread]);
10         });
11         
12     });
13     
14     NSLog(@"end %@",[NSThread currentThread]);
15 }

 1 - (void)demoAboutNSOperation
 2 {
 3    NSOperation * block =  [NSBlockOperation blockOperationWithBlock:^{
 4         NSLog(@"block %@",[NSThread currentThread]);
 5     }];
 6     
 7     [self.queue addOperation:block];
 8     
 9     [self.queue addOperationWithBlock:^{
10         NSLog(@"耗时操作 %@",[NSThread currentThread]);
11         [[NSOperationQueue mainQueue] addOperationWithBlock:^{
12             NSLog(@" mainQueue %@",[NSThread currentThread]);
13         }];
14     }];
15     
16     
17 }