IOS NSOperationQueue(线程 封装操作)

#import "HMViewController.h"

@interface HMViewController ()

@end

@implementation HMViewController

- (void)viewDidLoad
{
    [super viewDidLoad];

    [self operationQueue2];
}

- (void)operationQueue2
{
    NSBlockOperation *operation1 = [NSBlockOperation blockOperationWithBlock:^{
        NSLog(@"NSBlockOperation------下载图片1---%@", [NSThread currentThread]);
    }];
    NSBlockOperation *operation2 = [NSBlockOperation blockOperationWithBlock:^{
        NSLog(@"NSBlockOperation------下载图片2---%@", [NSThread currentThread]);
    }];
    [operation2 addExecutionBlock:^{
        NSLog(@"NSBlockOperation------下载图片22---%@", [NSThread currentThread]);
    }];

    NSOperationQueue *queue = [[NSOperationQueue alloc] init];
    queue.maxConcurrentOperationCount = ;

    [queue addOperation:operation1];
    [queue addOperation:operation2];

    [queue addOperationWithBlock:^{
        NSLog(@"NSBlockOperation------下载图片3---%@", [NSThread currentThread]);
    }];
}

- (void)opeationListen
{
    NSBlockOperation *operation = [NSBlockOperation blockOperationWithBlock:^{
        for (int i = ; i<; i++) {
            NSLog(@"NSBlockOperation------下载图片---%@", [NSThread currentThread]);
        }
    }];
    operation.completionBlock = ^{
        // ...下载完图片后想做事情
        NSLog(@"NSBlockOperation------下载图片完毕---%@", [NSThread currentThread]);
    };

    NSOperationQueue *queue = [[NSOperationQueue alloc] init];
    [queue addOperation:operation];
}

- (void)operationQueue
{
    // 1.封装操作
    NSInvocationOperation *operation1 = [[NSInvocationOperation alloc] initWithTarget:self selector:@selector(download) object:nil];
//    operation1.queuePriority = NSOperationQueuePriorityHigh

    NSInvocationOperation *operation2 = [[NSInvocationOperation alloc] initWithTarget:self selector:@selector(run) object:nil];

    NSBlockOperation *operation3 = [NSBlockOperation blockOperationWithBlock:^{
        for (int i = ; i < ; i++) {
            NSLog(@"NSBlockOperation------下载图片---%@", [NSThread currentThread]);
            [NSThread sleepForTimeInterval:0.1];
        }
    }];
//    [operation3 addExecutionBlock:^{
//        for (int i = 0; i<10; i++) {
//            NSLog(@"NSBlockOperation------下载图片2---%@", [NSThread currentThread]);
//            [NSThread sleepForTimeInterval:0.1];
//        }
//    }];

    // 2.创建队列
    NSOperationQueue *queue = [[NSOperationQueue alloc] init];
    queue.maxConcurrentOperationCount = ; // 2 ~ 3为宜

    // 设置依赖
    [operation2 addDependency:operation3];
    [operation3 addDependency:operation1];

    // 3.添加操作到队列中(自动执行操作, 自动开启线程)
    [queue addOperation:operation1];
    [queue addOperation:operation2];
    [queue addOperation:operation3];

//    [queue setSuspended:YES];
}

- (void)blockOperation
{
    // 1.封装操作
//    NSBlockOperation *operation = [NSBlockOperation blockOperationWithBlock:^{
//        NSLog(@"NSBlockOperation------下载图片1---%@", [NSThread currentThread]);
//    }];

    NSBlockOperation *operation = [[NSBlockOperation alloc] init];

    [operation addExecutionBlock:^{
        NSLog(@"NSBlockOperation------下载图片1---%@", [NSThread currentThread]);
    }];

    [operation addExecutionBlock:^{
        NSLog(@"NSBlockOperation------下载图片2---%@", [NSThread currentThread]);
    }];

    [operation addExecutionBlock:^{
        NSLog(@"NSBlockOperation------下载图片3---%@", [NSThread currentThread]);
    }];

    // 2.执行操作
    [operation start];
}

- (void)invocationOperation
{
    // 1.创建操作对象, 封装要执行的任务
    NSInvocationOperation *operation = [[NSInvocationOperation alloc] initWithTarget:self selector:@selector(download) object:nil];

    // 2.执行操作(默认情况下, 如果操作没有放到队列queue中, 都是同步执行)
    [operation start];
}

- (void)download
{
    for (int i = ; i<; i++) {
        NSLog(@"------download---%@", [NSThread currentThread]);
        [NSThread sleepForTimeInterval:0.1];
    }
}

- (void)run
{
    for (int i = ; i<; i++) {
        NSLog(@"------run---%@", [NSThread currentThread]);
        [NSThread sleepForTimeInterval:0.1];
    }
}

@end