IOS如何在一个界面嵌入一个网页

落日映苍穹つ 2022-08-05 08:15 268阅读 0赞

#### 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  
\{  
\[self createErrorView\];  
\}  
  
\}