iOS 线程

快来打我* 2022-08-01 13:52 127阅读 0赞

//
    //  NetWorkViewController.m
    //  AppUI组件学习
    //
    //  Created by 麦子 on 15/6/19.
    //  Copyright (c) 2015年 麦子. All rights reserved.
    //
    
    #import "NetWorkViewController.h"
    
    @interface NetWorkViewController ()
    
    @end
    
    @implementation NetWorkViewController
    
    - (void)viewDidLoad {
        [super viewDidLoad];
        self.view.backgroundColor = [UIColor whiteColor];
        self.title = @"网络和多线程";
        [self createView];
    }
    
    
    - (void)createView{
        
        UIButton *but = [UIButton buttonWithType:UIButtonTypeRoundedRect];
        but.frame = CGRectMake(120, 180, 100, 80);
        [but setTitle:@"NSThread" forState:UIControlStateNormal];
        but.backgroundColor = [UIColor orangeColor];
        but.tag = 1;
        [but addTarget:self action:@selector(butClick:) forControlEvents:UIControlEventTouchUpInside];
        [self.view addSubview:but];
        
        UIButton *butA = [UIButton buttonWithType:UIButtonTypeRoundedRect];
        butA.frame = CGRectMake(120, 280, 100, 80);
        [butA setTitle:@"NSOperation" forState:UIControlStateNormal];
        butA.backgroundColor = [UIColor orangeColor];
        butA.tag = 2;
        [butA addTarget:self action:@selector(butClick:) forControlEvents:UIControlEventTouchUpInside];
        [self.view addSubview:butA];
        
        
        UIButton *butB = [UIButton buttonWithType:UIButtonTypeRoundedRect];
        butB.frame = CGRectMake(120, 380, 100, 80);
        [butB setTitle:@"GCD" forState:UIControlStateNormal];
        butB.backgroundColor = [UIColor orangeColor];
        butB.tag = 3;
        [butB addTarget:self action:@selector(butClick:) forControlEvents:UIControlEventTouchUpInside];
        [self.view addSubview:butB];
        
    }
    
    
    - (void)butClick:(UIButton *)but{
        
        switch (but.tag) {
            case 1:{
    //            [NSThread detachNewThreadSelector:@selector(myThread:) toTarget:self withObject:nil];
                
                [NSThread currentThread].name = @"主线程";
                
                NSThread *thread = [[NSThread alloc] initWithTarget:self selector:@selector(myThread:) object:nil];
                thread.name = @"我的线程";
                [thread start];
                NSLog(@"mainName----%@",[NSThread currentThread].name);
                break;
            }
            case 2:{
                NSInvocationOperation *op = [[NSInvocationOperation alloc] initWithTarget:self selector:@selector(myThread:) object:@"me !"];
                
                // 尽量用这个
                NSOperationQueue *qu = [[NSOperationQueue alloc] init];
                [qu addOperation:op];//队列里面的是另外一条线程执行，它就是相当于线程池
                
    //            [op start];// 这种形式怎么是主线程
                break;
            }
            case 3:{
                // 会发现其中的线程编号有一样的，其实他的里面也是一个线程池。一般都是用这个方法处理。
                dispatch_async(dispatch_get_global_queue(0, 0), ^{
                  
                    NSLog(@"%@",[NSThread currentThread]);
                    
                    // 回到主队列，修改UI
                    dispatch_async(dispatch_get_main_queue(), ^{
                        UIButton *btn = (UIButton *)[self.view viewWithTag:3];
                        [btn setTitle:@"线程和主现场通信" forState:UIControlStateNormal];
                    });
                    
                
                });
                break;
            }
            default:
                break;
        }
        
    }
    
    
    -(void)myThread:(id)object {
        [NSThread sleepForTimeInterval:2];
        NSLog(@"线程开始---%@",[NSThread currentThread].name);
    }
    
    - (void)didReceiveMemoryWarning {
        [super didReceiveMemoryWarning];
        
    }
    
    
    
    @end