WebView，嘿嘿，懒人专用，直接复制粘贴就能用，frame可调

在控制器的.h文件中

#import <UIKit/UIKit.h>

#import "FirstView.h"

@interface FirstViewController :
UIViewController<UIWebViewDelegate> {

UIWebView *web;

UIActivityIndicatorView *activityIndicatorView;

UIView *opaqueView;

}

@property (nonatomic,
strong) FirstView *fv;

@end

在.m中，如下：

#import "FirstViewController.h"

@interface
FirstViewController ()

@end

@implementation FirstViewController

- (void)loadView {

[super loadView];

self.fv = [[FirstView
alloc] initWithFrame:[UIScreen
mainScreen].bounds];

self.view =
self.fv;

}

- (void)viewWillAppear:(BOOL)animated {

self.tabBarController.navigationController.navigationBar.barTintColor
= [UIColor colorWithRed:0.890
green:0.471
blue:0.118
alpha:1.000];

self.tabBarController.navigationController.title =
@"空中夺宝";

}

- (void)viewDidLoad {

[super
viewDidLoad];

web = [[UIWebView
alloc]initWithFrame:CGRectMake(0,
0, self.view.frame.size.width,
self.view.frame.size.height -
40)];

[web
setUserInteractionEnabled:YES];//是否支持交互

web.delegate=self;

[web
setOpaque:NO];
//opaque是不透明的意思

[web
setScalesPageToFit:YES];//自动缩放以适应屏幕

[self.view
addSubview:web];

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

[web
loadRequest:[NSURLRequest
requestWithURL:url]];

//2.加载本地文件资源

/* NSURL *url = [NSURL fileURLWithPath:filePath];

NSURLRequest *request = [NSURLRequest requestWithURL:url];

[webView loadRequest:request];*/

//3.读入一个HTML，直接写入一个HTML代码

//NSString *htmlPath = [[[NSBundle mainBundle]bundlePath]stringByAppendingString:@"webapp/loadar.html"];

//NSString *htmlString = [NSString stringWithContentsOfURL:htmlPath encoding:NSUTF8StringEncoding error:NULL];

//[webView loadHTMLString:htmlString baseURL:[NSURL fileURLWithPath:htmlPath]];

opaqueView = [[UIView
alloc]initWithFrame:[UIScreen
mainScreen].bounds];

activityIndicatorView = [[UIActivityIndicatorView
alloc]initWithFrame:[UIScreen
mainScreen].bounds];

[activityIndicatorView
setCenter:opaqueView.center];

[activityIndicatorView
setActivityIndicatorViewStyle:UIActivityIndicatorViewStyleWhite];

[opaqueView
setBackgroundColor:[UIColor
blackColor]];

[opaqueView
setAlpha:0.6];

[self.view
addSubview:opaqueView];

[opaqueView
addSubview:activityIndicatorView];

// Do any additional setup after loading the view.

}

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

[activityIndicatorView
startAnimating];

opaqueView.hidden =
NO;

}

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

[activityIndicatorView
startAnimating];

opaqueView.hidden =
YES;

}

//UIWebView如何判断 HTTP 404
等错误

-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{

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

NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *)response;

if ((([httpResponse
statusCode]/100) ==
2)) {

// self.earthquakeData = [NSMutableData data];

[UIApplication
sharedApplication].networkActivityIndicatorVisible =
YES;

[ web
loadRequest:[ NSURLRequest
requestWithURL: url]];

web.delegate =
self;

} else {

NSDictionary *userInfo = [NSDictionary
dictionaryWithObject:

NSLocalizedString(@"HTTP Error",

@"Error message displayed when receving a connection error.")

forKey:NSLocalizedDescriptionKey];

NSError *error = [NSError
errorWithDomain:@"HTTP"
code:[httpResponse
statusCode] userInfo:userInfo];

if ([error
code] == 404) {

// NSLog(@"xx");

web.hidden =
YES;

}

}

// Do any additional setup after loading the view.

}

- (void)didReceiveMemoryWarning {

[super
didReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}

/*

#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {

// Get the new view controller using [segue destinationViewController].

// Pass the selected object to the new view controller.

}

*/

@end

运行吧，是不是成功了！~~