webView和activityIndicatorView的使用

1 实现协议，在ViewController.h修改如下：

@interface webViewController : UIViewController

@end

UIWebView中几个重要的函数

1.- (void )webViewDidStartLoad:(UIWebView  *)webView  网页开始加载的时候调用

2.- (void )webViewDidFinishLoad:(UIWebView  *)webView  网页加载完成的时候调用

3.- (void)webView:(UIWebView *)webView  didFailLoadWithError:(NSError *)error 网页加载错误的时候调用

实现：

#import "webViewController.h"

@interface webViewController ()

@property (weak, nonatomic) IBOutlet UIWebView *webView;

@end

@implementation webViewController {

UIActivityIndicatorView *_activityIndicatorView;

}

- (void)viewDidLoad {

[super viewDidLoad];

_activityIndicatorView = [[UIActivityIndicatorView alloc] initWithFrame:CGRectMake(0, 0, 80, 80)];

_activityIndicatorView.activityIndicatorViewStyle = UIActivityIndicatorViewStyleGray;

_activityIndicatorView.center = self.webView.center;

[self.webView addSubview:_activityIndicatorView];

NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://www.baidu.com"]];

[self.webView loadRequest:request];

}

- (void)didReceiveMemoryWarning {

[super didReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}

-(void)webViewDidStartLoad:(UIWebView *)webView {

NSLog(@"start load!!!");

[_activityIndicatorView startAnimating];

}

-(void)webViewDidFinishLoad:(UIWebView *)webView {

NSLog(@"finish load!!!");

[_activityIndicatorView stopAnimating];

}

-(void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error {

NSLog(@"fail load!!!");

[_activityIndicatorView stopAnimating];

}

总结：

去掉UIWebView底部的黑条：

UIWebView底部的黑条很难看，特别是在底部还有透明控件的时候，隐藏的做法其实很简单，只需要将opaque设为NO，背景色设为clearColor即可。