网络多线程-NSOperation的常用的方法

#import "ViewController.h"

#import "XMGOperation.h"

@interface ViewController ()

/** */

@property(nonatomic ,strong)NSOperationQueue *queue;

@end

@implementation ViewController

- (IBAction)startBtnClick:(id)sender {

    

    //1.创建队列

    //串行和并发的功能,默认是并发

    NSOperationQueue *queue = [[NSOperationQueuealloc]init];

    

    XMGOperation *op1 = [[XMGOperationalloc]init];

    [queue addOperation:op1];

    /*

    //最大并发数:同一时间最多可以处理多少个操作

    queue.maxConcurrentOperationCount = 1;

    

    //2.封装操作

    NSBlockOperation *op1 = [NSBlockOperation blockOperationWithBlock:^{

        NSLog(@"1-%@",[NSThread currentThread]);

        [NSThread sleepForTimeInterval:1.0];

    }];

    

    NSBlockOperation *op2 = [NSBlockOperation blockOperationWithBlock:^{

        for (NSInteger i = 0; i<1000; i++) {

            NSLog(@"2-%zd--%@",i,[NSThread currentThread]);

        }

    }];

    

    NSBlockOperation *op3 = [NSBlockOperation blockOperationWithBlock:^{

        for (NSInteger i = 0; i<1000; i++) {

            NSLog(@"3-%zd--%@",i,[NSThread currentThread]);

        }

    }];

    

    NSBlockOperation *op4 = [NSBlockOperation blockOperationWithBlock:^{

        NSLog(@"4-%@",[NSThread currentThread]);

    }];

    

    NSBlockOperation *op5 = [NSBlockOperation blockOperationWithBlock:^{

        NSLog(@"5-%@",[NSThread currentThread]);

    }];

    NSBlockOperation *op6 = [NSBlockOperation blockOperationWithBlock:^{

        NSLog(@"6-%@",[NSThread currentThread]);

    }];

    

    //3.添加操作到队列

    [queue addOperation:op1];

    [queue addOperation:op2];

    [queue addOperation:op3];

    [queue addOperation:op4];

    [queue addOperation:op5];

    [queue addOperation:op6];

     */

    self.queue = queue;

    

}

- (IBAction)susPendBtnClick:(id)sender {

    

    //suspended 暂停:当为YES的时候暂停,NO的时候表示恢复

    //注意:暂停可以恢复的

    //暂停不会暂停当前正在执行的任务,暂停的是下一个任务

    if (self.queue.suspended) {

        self.queue.suspended =NO;

    }else

    {

        self.queue.suspended =YES;

    }

}

- (IBAction)cancelBtnClick:(id)sender {

    

    //取消是不可以恢复

    [self.queuecancelAllOperations];

}

@end

/*********-XMGOperation.m文件-****/

#import "XMGOperation.h"

@implementation XMGOperation

-(void)main

{

    for (NSInteger i =0 ; i<1000; i++) {

        NSLog(@"任务1--%zd-%@",i,[NSThreadcurrentThread]);

    }

    

    //判断当前操作是否被取消,如果被取消那么就直接返回

    if (self.isCancelled) {

        return;

    }

    NSLog(@"++++++++++++");

    

    for (NSInteger i =0 ; i<1000; i++) {

        NSLog(@"任务2--%zd-%@",i,[NSThreadcurrentThread]);

    }

    

        NSLog(@"++++++++++++");

    if (self.isCancelled) {

        return;

    }

    

    for (NSInteger i =0 ; i<1000; i++) {

        NSLog(@"任务3--%zd-%@",i,[NSThreadcurrentThread]);

    }

}

@end