UIWebView的一些总结

1.UIWebView的goback和goforward事件与前进后退按钮的关联

up vote 2 down vote accept

I recommend binding the forward and backward button directly to the UIWebview. Automatically enable and disable like this: - (void)webViewDidStartLoad:(UIWebView *)mwebView {     backButton.enabled = (webView.canGoBack);     forwardButton.enabled = (webView.canGoForward); } - (void)webViewDidFinishLoad:(UIWebView *)webView {     backButton.enabled = (webView.canGoBack);     forwardButton.enabled = (webView.canGoForward); }

2.从UIWebView通过Navigate后退的时候，APP crash了

在UIWebView销毁之前，需要停止load WebView并删除delegate，代码如下

- (void)dealloc {
    webView.delegate = nil;
    [webView stopLoading];
    [webView release];
    [super dealloc];
}

3. UIWebView Load的时候显示菊花(Wheel)

头文件加入

UIActivityIndicatorView *loadingIndicator;

ViewDidLoad中加入

loadingIndicator = [[UIActivityIndicatorView alloc] 

initWithFrame:CGRectMake(145, 190, 20,20)];
[loadingIndicator setActivityIndicatorViewStyle:UIActivityIndicatorViewStyleGray];
[loadingIndicator setHidesWhenStopped:YES];

[webView addSubview:loadingIndicator];

-(void)webViewDidStartLoad:(UIWebView *)webView 显示滚轮

[loadingIndicator startAnimating ];

-(void)webViewDidFinishLoad:(UIWebView *)webView 隐藏滚轮

[loadingIndicator stopAnimating ];

4. UIWebView发起一次google搜索

NSString *baseText = @"http://www.google.com/search?btnG=Google+Search&q=";

NSString *search = [NSString stringWithFormat:@"%@%@" , baseText, self.searchText];

NSString* escapedUrlString = [search stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

[webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:escapedUrlString]]];

 

转载：http://ihelloray.blog.163.com/blog/static/18748808620115266268876/