IOS开发－UI学习－UIWebView，简单浏览器的制作

制作一个简单的浏览器，包含网址输入框，Search按钮，前进、回退按钮，UIWebView就这几个简单的控件。

UITextField：用来输入网址；

UIbuttom：实现前进，后退，搜索等功能；

UIWebView：实现网页展示。

准备工作：

右键Info.plist并Open As Source Code，打开之后添加以下代码段：

     <key>NSAppTransportSecurity</key>

     <dict>

     <key>NSAllowsArbitraryLoads</key>

     <true/>

     </dict>

以上代码段功能：有些网址为Http，要搞成Https，具体原理以后探索出来了再补充。

言归正传，实现浏览器功能的具体代码如下：

 #import "ViewController.h"

 @interface ViewController (){

 //    定义全局变量，各个控件

     UIWebView *mywebview;

     UIButton *backbutton;

     UIButton *goforbutton;

     UITextField *urlField;

     UIButton *searchButton;

 }

 @end

 @implementation ViewController

 - (void)viewDidLoad {

     [super viewDidLoad];

 //    添加浏览器view，

     mywebview = [[UIWebView alloc]initWithFrame:CGRectMake(, , self.view.frame.size.width, self.view.frame.size.height-)];

     [self.view addSubview:mywebview];

 //    网址输入框

     urlField = [[UITextField alloc]initWithFrame:CGRectMake(, , self.view.frame.size.width-, )];

     urlField.borderStyle = UITextBorderStyleRoundedRect;

     urlField.text= mywebview.request.URL.absoluteString;

     [self.view addSubview:urlField];

 //    search button

     searchButton = [[UIButton alloc]initWithFrame:CGRectMake(self.view.frame.size.width-, , , )];

     searchButton.backgroundColor = [UIColor redColor];

     [searchButton setTitle:@"Search" forState:UIControlStateNormal];

     [searchButton addTarget:self action:@selector(search:) forControlEvents:UIControlEventTouchUpInside];

     [self.view addSubview:searchButton];

 //    返回按键

     backbutton = [[UIButton alloc]initWithFrame:CGRectMake(, self.view.frame.size.height-, , )];

     backbutton.backgroundColor = [UIColor redColor];

     [backbutton setTitle:@"返回" forState:UIControlStateNormal];

     [backbutton addTarget:self action:@selector(backFbution:) forControlEvents:UIControlEventTouchUpInside];

     [self.view addSubview:backbutton];

 //    前进按钮

     goforbutton = [[UIButton alloc]initWithFrame:CGRectMake(self.view.frame.size.width-, self.view.frame.size.height-, , )];

     goforbutton.backgroundColor = [UIColor redColor];

     [goforbutton setTitle:@"前进" forState:UIControlStateNormal];

     [goforbutton addTarget:self action:@selector(goFobution:) forControlEvents:UIControlEventTouchUpInside];

     [self.view addSubview:goforbutton];

 }

 //返回按钮绑定事件

 -(void)backFbution:(id)sender{

     [mywebview goBack];

 }

 //前进按钮绑定事件

 -(void)goFobution:(id)sender{

     [mywebview goForward];

 }

 //搜索按钮绑定事件

 -(void)search:(id)sender{

     [mywebview loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:urlField.text]]];

 }

 - (void)didReceiveMemoryWarning {

     [super didReceiveMemoryWarning];

 }

 @end

运行效果如下（请无视UI所用颜色。。。。。）：

存在一个问题，就是我在百度里面随便点击一个网址链接之后，可以打开网址，但打开之后浏览器的网址输入框中的网址依然是之前那个，没有改变为当前网站地址。这个问题遗留下来。。。

巴特西

IOS开发－UI学习－UIWebView，简单浏览器的制作

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