当前苹果已经禁止了，通过IOS应用直接跳转APP下载链接的方法。但是仍然可以使用另外一种方法直接跳转AppStore。

这种方法需要增加一个类库StoreKit.framework。 这里使用这功能是为用户提供更新，下面说下我实现这个功能的详细步骤。

一、增加一个网页到服务器上去，title增加你当前APP的版本号。

      

二、在viewDidLoad里面增加UIWebView加载服务器上增加的网页,并获取当前版本号       

    1:下面是是uiwebview 加载网页的代码

-(void)viewDidLoad
{
    [super viewDidLoad];
   BeeUIWebView* getVersionWebView=[[BeeUIWebView alloc]initWithFrame:CGRectMake(0, 0, 100, 100)];
     getVersionWebView.backgroundColor = [UIColor redColor];
    getVersionWebView.scalesPageToFit =YES;
     NSString *pagePath=[NSString stringWithFormat:@"http://www.jmfww.com/Mobile/iosVersionInfo.html"];
 NSURL    *url =[[NSURL alloc] initWithString: pagePath];
    NSURLRequest *request =  [[NSURLRequest alloc] initWithURL:url];
    getVersionWebView.delegate=self;
    [getVersionWebView loadRequest:request];
    
}

   2:uiwebview代理

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

    NSString  *value= [webView stringByeva luatingjava scriptFromString:@"document.title"];
    NSArray *VersionAndStoreLoadUrlArray= [value componentsSeparatedByString:@","];
    
    NSString *Version=[VersionAndStoreLoadUrlArray objectAtIndex:1];
     NSDictionary *infoDictionary = [[NSBundle mainBundle] infoDictionary];
        // app名称
      //  NSString *app_Name = [infoDictionary objectForKey:@"CFBundleDisplayName"];
        // app版本
        NSString *app_Version = [infoDictionary objectForKey:@"CFBundleShortVersionString"];
    
        if (![app_Version isEqualToString:Version]) {
         
            showMessage(@"请前往AppStore下载最新版本");
            
              [self openAppStore:@"932016124"];
            
        }
}

二、SKStoreProductViewController

//首先引入SKStoreProductViewController代理SKStoreProductViewControllerDelegate
 //跳转APPSTORE的方法
-(void)openAppStore:(NSString *)appId{
    SKStoreProductViewController *storeProducVC=
    [[SKStoreProductViewController alloc]init];
    storeProducVC.delegate=self;
    NSDictionary *dict=[NSDictionary dictionaryWithObject:appId forKey:SKStoreProductParameterITunesItemIdentifier];
    
    [storeProducVC loadProductWithParameters:dict completionBlock:^(BOOL result, NSError * _Nullable error) {
        if (result) {
            [self  presentViewController:storeProducVC animated:YES completion:nil];
            
        }
    }];
    

}

//SKStoreProductViewController返回代理
-(void)productViewControllerDidFinish:(SKStoreProductViewController *)viewController
{
    [viewController dismissViewControllerAnimated:YES completion:nil];
}