IOS如何在一个界面嵌入一个网页

1.判断当前是否可以使用网络

+(BOOL) isConnectionAvailable

{

    BOOL isExistenceNetwork = YES;

    Reachability *reach = [Reachability reachabilityWithHostName:@"www.apple.com"];

    switch ([reach currentReachabilityStatus]) {

        case NotReachable:

            isExistenceNetwork = NO;

            //NSLog(@"notReachable");

            break;

        case ReachableViaWiFi:

            isExistenceNetwork = YES;

            //NSLog(@"WIFI");

            break;

        case ReachableViaWWAN:

            isExistenceNetwork = YES;

            //NSLog(@"3G");

            break;

    }

    

    return isExistenceNetwork;
}

2.如果网络可用就可以把网页加载进来

-(void)creatWebView

{
UIWebView *webView = [[UIWebView alloc] initWithFrame:CGRectMake(0, 64, self.view.frame.size.width, self.view.frame.size.height-64)];
webView.delegate = (id)self;
webView.scalesPageToFit = YES ;
webView.scrollView.scrollEnabled = YES;
NSURLRequest *request =[NSURLRequest requestWithURL:[NSURL URLWithString:[NSString stringWithFormat:@"%@",live800URL]]];
[self.view addSubview:webView];
[webView loadRequest:request];

}

3.如果网络不可用用加载一张网络不用用的图片并添加事件处理函数

-(void) createErrorView

{
self.wifiImageView = [[UIView alloc]initWithFrame:CGRectMake(0, 64, self.view.frame.size.width, self.view.frame.size.height-64)];
self.wifiImageView.backgroundColor = [UIColor whiteColor];
UIImageView *imageView = [[UIImageView alloc]initWithImage:[[UIImage imageNamed:@"wifi"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]];
imageView.center = CGPointMake(self.view.frame.size.width/2, self.wifiImageView.frame.size.height/2);
[self.wifiImageView addSubview:imageView];
[self.view addSubview:self.wifiImageView];
self.wifiImageView.userInteractionEnabled = YES;
UITapGestureRecognizer *singleTap1 = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(reFreshNetwork)];
[self.wifiImageView addGestureRecognizer:singleTap1];

}

事件处理函数

-(void) reFreshNetwork{

if ([ConnectNetwork isConnectionAvailable])
{
[self.wifiImageView removeFromSuperview];
[self creatWebView];
}else
{
[self createErrorView];
}

}