NSOperationQueue使用

1.NSInvocationOperation使用

-(NSOperationQueue*)operation_q{

    if (!_operation_q) {

        _operation_q=[[NSOperationQueue alloc]init];

    }

 return _operation_q;

}

[self WJ_NSInvocationOperation_demo];

-(void)WJ_NSInvocationOperation_demo{

    /**      - (void)start;

      - (void)main;

      @property (readonly, getter=isCancelled) BOOL cancelled;

      - (void)cancel;

      @property (readonly, getter=isExecuting) BOOL executing;

      @property (readonly, getter=isFinished) BOOL finished;

      @property (readonly, getter=isConcurrent) BOOL concurrent; // To be deprecated; use and override 'asynchronous' below

      @property (readonly, getter=isAsynchronous) BOOL asynchronous API_AVAILABLE(macos(10.8), ios(7.0), watchos(2.0), tvos(9.0));

      @property (readonly, getter=isReady) BOOL ready;

      - (void)addDependency:(NSOperation *)op;

      - (void)removeDependency:(NSOperation *)op;


      */


    _invocation_o=[[NSInvocationOperation alloc]initWithTarget:self selector:@selector(invocationTaget:)object:@"invocationTage"];

    [self.operation_q addOperation:_invocation_o];

    for(inti =0; i<10; i++) { 

        NSInvocationOperation*  invocation_O =[[NSInvocationOperation alloc]initWithTarget:self selector:@selector(invocationTaget:)object:@(i)];


          //异步执行子线程执行充分利用cpu多核

            [self.operation_q addOperation:invocation_O];


          /***


           2020-06-03 13:36:44.740107+0800 IOStestOC[9218:184616] {number = 3, name = (null)}-----invocationTage

           2020-06-03 13:36:44.740149+0800 IOStestOC[9218:184603] {number = 5, name = (null)}-----1

           2020-06-03 13:36:44.740162+0800 IOStestOC[9218:184609] {number = 6, name = (null)}-----0

           2020-06-03 13:36:44.740184+0800 IOStestOC[9218:184608] {number = 4, name = (null)}-----2

           2020-06-03 13:36:44.740409+0800 IOStestOC[9218:184616] {number = 3, name = (null)}-----3

           2020-06-03 13:36:44.740453+0800 IOStestOC[9218:184603] {number = 5, name = (null)}-----4

           2020-06-03 13:36:44.740979+0800 IOStestOC[9218:184608] {number = 4, name = (null)}-----7

           2020-06-03 13:36:44.741052+0800 IOStestOC[9218:184616] {number = 3, name = (null)}-----8

           2020-06-03 13:36:44.741080+0800 IOStestOC[9218:184611] {number = 7, name = (null)}-----5

           2020-06-03 13:36:44.741101+0800 IOStestOC[9218:184603] {number = 5, name = (null)}-----9

           2020-06-03 13:36:44.741109+0800 IOStestOC[9218:184609] {number = 6, name = (null)}-----6

           */


      }



}

-(void)invocationTaget:(id)object{          NSLog(@"%@-----%@",[NSThread currentThread],object);    }

NSBlockOperation

-(void)WJ_NSBlockOperation_demo{

    for(inti =0; i<100; i++) {

        NSOperationQueue* part_operation =[[NSOperationQueue alloc]init];

           NSBlockOperation* block_operation =[NSBlockOperation blockOperationWithBlock:^{

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

           }];

        /*** 添加到子线程执行执行 */


        //和 self.operation_q对比没有任何区别

           [part_operation addOperation:block_operation];

    }

    /****


     2020-06-03 13:54:20.488265+0800 IOStestOC[9672:200208] {number = 3, name = (null)}

     2020-06-03 13:54:20.488365+0800 IOStestOC[9672:200320] {number = 8, name = (null)}

     2020-06-03 13:54:20.488432+0800 IOStestOC[9672:200318] {number = 7, name = (null)}

     2020-06-03 13:54:20.488706+0800 IOStestOC[9672:200319] {number = 9, name = (null)}

     2020-06-03 13:54:20.488725+0800 IOStestOC[9672:200208] {number = 3, name = (null)}

     2020-06-03 13:54:20.488885+0800 IOStestOC[9672:200321] {number = 10, name = (null)}

     2020-06-03 13:54:20.488985+0800 IOStestOC[9672:200320] {number = 8, name = (null)}

     2020-06-03 13:54:20.489440+0800 IOStestOC[9672:200318] {number = 7, name = (null)}

     2020-06-03 13:54:20.489677+0800 IOStestOC[9672:200208] {number = 3, name = (null)}

     2020-06-03 13:54:20.489815+0800 IOStestOC[9672:200322] {number = 11, name = (null)}


     */

    /***

     可以直接在主线程执行

        [block_operation start];

        [block_operation main];

     */


}

NSOperationQueue_OperationWithBlock

-(void)NSOperationQueue_OperationWithBlock_demo{     //开发中使用比较方便子线程异步多线程安全执行不会出现死锁现象      for (int i =0; i<10; i++) {     [self.operation_q addOperationWithBlock:^{                 NSLog(@"%@---%d",[NSThread currentThread],i);         /**                    2020-06-03 14:08:34.133443+0800 IOStestOC[9976:211832] {number = 7, name = (null)}---0          2020-06-03 14:08:34.133471+0800 IOStestOC[9976:211937] {number = 8, name = (null)}---2          2020-06-03 14:08:34.133487+0800 IOStestOC[9976:211836] {number = 3, name = (null)}---1          2020-06-03 14:08:34.133518+0800 IOStestOC[9976:211938] {number = 9, name = (null)}---3          2020-06-03 14:08:34.133662+0800 IOStestOC[9976:211937] {number = 8, name = (null)}---5          2020-06-03 14:08:34.133710+0800 IOStestOC[9976:211836] {number = 3, name = (null)}---4          2020-06-03 14:08:34.133724+0800 IOStestOC[9976:211832] {number = 7, name = (null)}---6          2020-06-03 14:08:34.133785+0800 IOStestOC[9976:211938] {number = 9, name = (null)}---7          2020-06-03 14:08:34.133861+0800 IOStestOC[9976:211836] {number = 3, name = (null)}---8          2020-06-03 14:08:34.133892+0800 IOStestOC[9976:211937] {number = 8, name = (null)}---9                    */     }];      } }

线程间通信 

-(void)WJ_Inter_thread_communication{     //线程间通讯  

  [self.operation_q addOperationWithBlock:^{        //子线程处理数据        NSLog(@"%@",[NSThread currentThread]);      

  //主线程刷新数据      

  [[NSOperationQueue mainQueue] addOperationWithBlock:^{             NSLog(@"%@",[NSThread currentThread]);         }];   

    /**         2020-06-03 14:15:36.548571+0800 IOStestOC[10098:217774] {number = 5, name = (null)}         2020-06-03 14:15:36.557632+0800 IOStestOC[10098:217501] {number = 1, name = main}         */     }];      }

 -(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{ //    NSLog(@"取消所有操作"); //    [self.operation_q cancelAllOperations]; //    NSLog(@"取消的操作数 %tu",self.operation_q.operationCount); //         //判断队列是否挂起!         if (self.operation_q.isSuspended) {            NSLog(@"继续 %tu",self.operation_q.operationCount);             self.operation_q.suspended = NO;                          NSLog(@"继续的操作数 %tu",self.operation_q.operationCount);         }else{             NSLog(@"暂停 %tu",self.operation_q.operationCount);             self.operation_q.suspended = YES;         }          }

设置同时进行最大并发数默认在子线程工作

-(void)WJ_maximum_number_concurrent{     //设置同时进行最大并发数     self.operation_q.maxConcurrentOperationCount = 3;      //添加操作进队列         for (int i=0; i< 30; i++) {             [self.operation_q addOperationWithBlock:^{                 [NSThread sleepForTimeInterval:3.0];                 NSLog(@"%@-----%d",[NSThread currentThread],i);             }];         }    /**     2020-06-03 14:28:52.510663+0800 IOStestOC[10446:228994] {number = 5, name = (null)}-----1     2020-06-03 14:28:52.510663+0800 IOStestOC[10446:228998] {number = 6, name = (null)}-----0     2020-06-03 14:28:52.510663+0800 IOStestOC[10446:228993] {number = 4, name = (null)}-----2     2020-06-03 14:28:53.512770+0800 IOStestOC[10446:228993] {number = 4, name = (null)}-----5     2020-06-03 14:28:53.512772+0800 IOStestOC[10446:228994] {number = 5, name = (null)}-----3     2020-06-03 14:28:53.512772+0800 IOStestOC[10446:228999] {number = 3, name = (null)}-----4     2020-06-03 14:28:54.517395+0800 IOStestOC[10446:228993] {number = 4, name = (null)}-----8     2020-06-03 14:28:54.517396+0800 IOStestOC[10446:228998] {number = 6, name = (null)}-----6     2020-06-03 14:28:54.517396+0800 IOStestOC[10446:228994] {number = 5, name = (null)}-----7     2020-06-03 14:28:55.522114+0800 IOStestOC[10446:228993] {number = 4, name = (null)}-----9     2020-06-03 14:28:55.522114+0800 IOStestOC[10446:228999] {number = 3, name = (null)}-----10     */      }

添加依赖关系


-(void)WJ_Add_dependency{

    /**

    1,2,3完成,后续操作

     */

        //1.下载

        NSBlockOperation * op1 =[NSBlockOperation blockOperationWithBlock:^{

            [NSThread sleepForTimeInterval:0.5];

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

        }];

        //2.下载

        NSBlockOperation * op2 =[NSBlockOperation blockOperationWithBlock:^{

              [NSThread sleepForTimeInterval:1.0];

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

        }];

        //3.通知完成

        NSBlockOperation * op3 =[NSBlockOperation blockOperationWithBlock:^{

            NSLog(@"通知完成3---%@",[NSThread currentThread]);

        }];

        //NSOperation 提供了依赖关系

        [op2addDependency:op1];

        [op3addDependency:op2];


    //添加到队列中  waitUntilFinished:是否等待


    /**

     //YES会主当前线程等待打印结果

    2020-06-03 15:05:45.214593+0800 IOStestOC[11433:261296] 下载1---{number = 6, name = (null)}

    2020-06-03 15:05:46.216319+0800 IOStestOC[11433:261295] 下载2---{number = 7, name = (null)}

    2020-06-03 15:05:46.216840+0800 IOStestOC[11433:261077] 什么时候执行打印{number = 1, name = main}

    2020-06-03 15:05:46.231206+0800 IOStestOC[11433:261077] 通知完成3---{number = 1, name = main}

    */


    /**

      //NO 不会卡线程 打印结果

     2020-06-03 15:08:03.482995+0800 IOStestOC[11508:263228] 什么时候执行打印{number = 1, name = main}

     2020-06-03 15:08:03.987297+0800 IOStestOC[11508:263486] 下载1---{number = 3, name = (null)}

     2020-06-03 15:08:04.990830+0800 IOStestOC[11508:263486] 下载2---{number = 3, name = (null)}

     2020-06-03 15:08:04.991214+0800 IOStestOC[11508:263228] 通知完成3---{number = 1, name = main}

     */

//        //先异步执行代码

//        [self.operation_q addOperations:@[op1,op2] waitUntilFinished:NO];

//        //主线程刷新界面 或者必须在主线程的操作

//        [[NSOperationQueue mainQueue] addOperation:op3];

//

//

//      NSLog(@"什么时候执行打印%@",[NSThread currentThread]);

    //全部在子线程的操作代码

    /***

     //waitUntilFinished:YES

     [self.operation_q addOperations:@[op1,op2,op3] waitUntilFinished:YES];

             NSLog(@"什么时候执行打印%@",[NSThread currentThread]);

     2020-06-03 15:10:23.991561+0800 IOStestOC[11591:265688] 下载1---{number = 3, name = (null)}

     2020-06-03 15:10:24.993174+0800 IOStestOC[11591:265944] 下载2---{number = 8, name = (null)}

     2020-06-03 15:10:24.993525+0800 IOStestOC[11591:265688] 通知完成3---{number = 3, name = (null)}

     2020-06-03 15:10:24.993850+0800 IOStestOC[11591:265435] 什么时候执行打印{number = 1, name = main}

     */


    /**

     //waitUntilFinished:NO

     [self.operation_q addOperations:@[op1,op2,op3] waitUntilFinished:NO];

             NSLog(@"什么时候执行打印%@",[NSThread currentThread]);

     2020-06-03 15:02:16.051287+0800 IOStestOC[11285:257420] 什么时候执行打印{number = 1, name = main}

     2020-06-03 15:02:16.553478+0800 IOStestOC[11285:257662] 下载1---{number = 3, name = (null)}

     2020-06-03 15:02:17.555200+0800 IOStestOC[11285:257666] 下载2---{number = 7, name = (null)}

     2020-06-03 15:02:17.555561+0800 IOStestOC[11285:257662] 通知完成3---{number = 3, name = (null)}


     */

   // maxConcurrentOperationCount

}

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