首先演示一下主线程的阻塞 // DYFViewController.m// 623-01-阻塞多线程//// Created by dyf on 14-6-23.// Copyright (c) 2014年 ___FULLUSERNAME___. All rights reserved.// #import "DYFViewController.h" @interface DYFViewController () @end @implementation DYFViewController- (IBAction)btnOnClick { // 1.获取当前的线程 NSThread *thread = [NSThread currentThread]; // 2.打印线程 NSLog(@"%@", thread); // 3.执行一线耗时的操作 for (int i = 0; i < 9999; i++) { NSLog(@"%@", thread); // 此时点击按钮，在执行完耗时操作之前，按钮一直是高亮状态，期间用户点击其他的UI控件也不好响应 }} - (void)viewDidLoad{ [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib.} - (void)didReceiveMemoryWarning{ [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated.}
@end
容易发现，在耗时操作期间，其它UI操作都被延时了，造成用户的卡顿现象
——–创建子线程方法1–pthread
// DYFViewController.m// 623-02-pthread//// Created by dyf on 14-6-23.// Copyright (c) 2014年 ___FULLUSERNAME___. All rights reserved.// #import "DYFViewController.h"#import <pthread.h> @interface DYFViewController () @end @implementation DYFViewController // c语言函数void *run(void *data){ // 1.获取当前的线程 NSThread *cThread = [NSThread currentThread]; // 2.打印线程 NSLog(@"%@", cThread); // 3.h耗时操作 for (int i = 0; i < 9999; i++) { NSLog(@"%@", cThread); } return NULL;} - (IBAction)btnOnClick { // 1.获取当前的线程 NSThread *thread = [NSThread currentThread]; // 2.打印线程 NSLog(@"%@", thread); // 3.执行一线耗时的操作 ： 创建一套子线程 pthread_t threadId; pthread_create(&threadId, NULL, *run, NULL); }
@end
