iOS多线程之NSOperation和NSOperationQueue的使用

#pragma mark NSOperationQueue 

- (void)doBtnFoure
{
    //一：主线程测试；
    //NSOperationQueue *mainQueue = [NSOperationQueue mainQueue];
    
    //主线种之中添加任务；卡UI
    //测试一；
//    [mainQueue addOperationWithBlock:^{
//        [self doOperation:@"NSOperationQueue MainQueue"];
//    }];
    
    //测试2；
//    [mainQueue addOperation:[NSBlockOperation blockOperationWithBlock:^{
//        [self doOperation:@"MainQueue add BlockOperation"];
//    }]];
    
    
    
    //二：创建Quene，其他线程处理；不卡UI； 默认并行，异步执行；
    NSOperationQueue *myQueue = [[NSOperationQueue alloc]init];
    myQueue.maxConcurrentOperationCount = 2;   //设置并行操作线程的最大个数；
    [myQueue addOperationWithBlock:^{
        [self doOperation:@"MyQueue "];
    }];
    
    [myQueue addOperation:[NSBlockOperation blockOperationWithBlock:^{
        [self doOperation:@"MyQueue NSBlockOperation"];
    }]];
    
    NSInvocationOperation *invoOp = [[NSInvocationOperation alloc]initWithTarget:self selector:@selector(doOperation:) object:@"MyQueue NSInvocationOp"];
    [myQueue addOperation:invoOp];
    
    
}



#pragma mark 自定的 MyOperation

- (void)doBtnThree
{
    // 串行执行任务，卡UI 在 当前线程执行；
    MyOperation *myOperation = [[MyOperation alloc]init];
    [myOperation start];
    
    MyOperation *op2 = [[MyOperation alloc]init];
    [op2 start];
}


#pragma mark 只有将operation放到一个NSOperationQueue中，才会异步执行操作
//

- (void)doBtnTwo
{
    //卡UI，在当前线程之中执行；同步,串行执行多个NSBlockOp,并行执行NSOp里面的 ExecuBlock；
    //每个ExecuBlock都是一个新的线程；
    NSBlockOperation *blockOp = [[NSBlockOperation alloc]init];
    [blockOp addExecutionBlock:^{
        [self doOperation:@"NSBlockOperation1   1111"];
    }];
    [blockOp addExecutionBlock:^{
        [self doOperation:@"NSBlockOperation1   2222"];
    }];
    
    [blockOp start];
    
    /* 线程执行完的操作；
    blockOp.completionBlock = ^(){
        NSLog(@"执行完成");
    };
     */
 
    
    
    NSBlockOperation *blockOp2 = [[NSBlockOperation alloc]init];
    [blockOp2 addExecutionBlock:^{
        [self doOperation:@"NSBlockOperation2   1111"];

    }];
    [blockOp2 addExecutionBlock:^{
        [self doOperation:@"NSBlockOperation2   2222"];

    }];
    
    [blockOp2 start];
    
    
}

- (void)doBtnOne
{
    //在当前线程中执行，卡UI ;同步,串行；
    NSInvocationOperation *oper1 = [[NSInvocationOperation alloc]initWithTarget:self selector:@selector(doOperation:) object:@"NSINvocationOperation 111"];
    NSInvocationOperation *oper2 = [[NSInvocationOperation alloc]initWithTarget:self selector:@selector(doOperation:) object:@"NSINvocationOperation 222"];
    [oper1 start];
    [oper2 start];
}

//任务测试

- (void)doOperation:(NSString *)aStr
{
    for (int i = 0; i < 5000; i ++) {
        NSLog(@"%@ --> %d",aStr,i);
    }
}