牛骨文教育服务平台(让学习变的简单)
#pragma mark - NSBlockOperation
- (void)test4{
    
    NSOperationQueue * threadQueue = [[NSOperationQueue alloc] init];
    // Block真心方便
    [threadQueue addOperationWithBlock:^{
        
        for (int i =0; i <100; i++) {
            NSLog(@"--多线程--%d",i);
        }
    }];
    
    for (int i =0; i <100; i++) {
        NSLog(@"--主线程--%d",i);
    }
    
    [threadQueue release];
}

#pragma mark - NSInvocationOperation
- (void)test5{
    
    //创建一个线程队列
    NSOperationQueue * threadQueue = [[NSOperationQueue alloc]init];

    //设置线程执行的并发数( -1 代表没有限制)
    threadQueue.maxConcurrentOperationCount =1;
    
    //创建一个线程操作对象
    NSInvocationOperation * threadOperation = [[NSInvocationOperation alloc]initWithTarget:selfselector:@selector(mutableThread5)object:nil];

    //设置线程操作对象的优先级
    threadOperation.queuePriority =NSOperationQueuePriorityVeryHigh;
    
    //可添加多个,还有一个添加数组对象的方法
    [threadQueue addOperation:threadOperation];
    
    for (int i =0; i <100; i++) {
        NSLog(@"--主线程--%d",i);
    }
    
    [threadOperation release];
    [threadQueue release];
}

- (void)mutableThread5{
    
    for (int i =0; i <100; i++) {
        NSLog(@"--多线程--%d",i);
    }
}

@最后看看NSOperationQueue的其它常用方法:

- (void)addOperations:(NSArray *)ops waitUntilFinished:(BOOL)wait; //批量加入执行operation,wait标志是否当前线程等待所有operation结束后,才返回

- (void)addOperationWithBlock:(void (^)(void))block; //相当于加入一个NSBlockOperation执行任务

- (NSArray *)operations; //返回已加入执行operation的数组,当某个operation结束后会自动从这个数组清除

- (NSUInteger)operationCount //返回已加入执行operation的数目

- (void)setSuspended:(BOOL)b; //是否暂停将要执行的operation,但不会暂停已开始的operation

- (BOOL)isSuspended; //返回暂停标志

- (void)cancelAllOperations; //取消所有operation的执行,实质是调用各个operation的cancel方法

+ (id)currentQueue; //返回当前NSOperationQueue,如果当前线程不是在NSOperationQueue上运行则返回nil

+ (id)mainQueue; //返回主线程的NSOperationQueue,缺省总是有一个queue