UIWebview基本使用（原生加载框UIActivityIndicatorView）

ゝ一世哀愁。 2023-10-17 06:21 23阅读 0赞

UIWebview的基本使用，并且自带加载框

- (void)viewDidLoad
    {
        [super viewDidLoad];
        //设置webView的代理
        _webView.delegate = self;
        
        _indicator = [[UIActivityIndicatorView alloc]initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
        _indicator.center = self.view.center;
        _indicator.hidesWhenStopped = YES;
        [self.view addSubview:_indicator];
    }
    
    - (IBAction)gotoWebsite:(UIButton *)sender
    {
        //UIWebView  网页视图，能够加载一个网页
        NSURL *url = [NSURL URLWithString:_textFIeld.text];
        NSURLRequest *request = [NSURLRequest requestWithURL:url];
        //loadRequest  加载一个请求
        [_webView loadRequest:request];
        [_textFIeld resignFirstResponder];
    }
    
    - (IBAction)openFIleClick:(UIButton *)sender
    {
        //webView除了加载网页，还可以浏览一些常用的类型文件（pdf,doc,jpg,txt）等
        NSString *path = [[NSBundle mainBundle]pathForResource:@"YiChat" ofType:@"pdf"];
        //生成一个本地文件的URL
        NSURL *url = [[NSURL alloc]initFileURLWithPath:path];
        NSURLRequest *request = [NSURLRequest requestWithURL:url];
        //loadRequest  加载一个请求
        [_webView loadRequest:request];
        [url release];
    }
    
    //webView 将要加载一个请求时调用，返回YES继续加载，返回NO停止加载
    - (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
    {
        NSLog(@"%@",request.URL);
        return YES;
    }
    
    //加载已经开始时调用
    - (void)webViewDidStartLoad:(UIWebView *)webView
    {
        [_indicator startAnimating];
    }
    
    //加载完成时调用
    - (void)webViewDidFinishLoad:(UIWebView *)webView
    {
        [_indicator stopAnimating];
    }
    
    //加载失败时调用
    - (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error
    {
        [_indicator stopAnimating];
    }

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