//
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// GCDPage.m
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// BaseProject
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//
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// Created by WindShan on 2016/12/9.
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// Copyright © 2016年 WindShan. All rights reserved.
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//
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#import "GCDPage.h"
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@interface GCDPage ()
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@end
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@implementation GCDPage
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- (void)viewDidLoad {
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[super viewDidLoad];
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// Do any additional setup after loading the view.
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dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
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//子线程异步执行下载任务，防止主线程卡顿
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NSURL *url = [NSURL URLWithString:@"http://www.baidu.com"];
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NSError *error;
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NSString *htmlData = [NSString stringWithContentsOfURL:url encoding:NSUTF8StringEncoding error:&error];
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if (htmlData != nil)
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{
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//异步返回主线程，根据获取的数据，更新UI
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dispatch_async(dispatch_get_main_queue(), ^{
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NSLog(@"根据更新UI界面");
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});
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} else {
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NSLog(@"error when download:%@",error);
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}
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});
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}
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- (void)didReceiveMemoryWarning {
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[super didReceiveMemoryWarning];
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// Dispose of any resources that can be recreated.
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}
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/*
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#pragma mark - Navigation
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// In a storyboard-based application, you will often want to do a little preparation before navigation
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- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
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// Get the new view controller using [segue destinationViewController].
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// Pass the selected object to the new view controller.
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}
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*/
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@end
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