在App中跳转到AppStore下载应用

怎么在App中跳转到AppStore中有2中方法：

1.  应用内跳转

需要导入头文件：<StoreKit/StoreKit.h>， StoreKit是跟appStore有关的框架；

遵守协议     SKStoreProductViewControllerDelegate

@interface ViewController () <SKStoreProductViewControllerDelegate>

// 创建一个打开打开appStore的方法：
- (void)openAppStore:(NSString *)appId;
@end

//实现协议中的方法

- (void)productViewControllerDidFinish:(SKStoreProductViewController *)viewController {

    [viewController dismissViewControllerAnimated:YES completion:nil];
}

- (void)openAppStore:(NSString *)appId
{
    SKStoreProductViewController *storeProductVC = [[SKStoreProductViewController alloc] init];
    storeProductVC.delegate = self;
    
    NSDictionary *dic = [NSDictionary dictionaryWithObject:appId forKey:SKStoreProductParameterITunesItemIdentifier];
    [storeProductVC loadProductWithParameters:dic completionBlock:^(BOOL result, NSError * _Nullable error) {
        if (result) {
            [self presentViewController:storeProductVC animated:YES completion:nil];
        }
    }];
}

2. 跨应用跳转

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event

{

    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"itms://itunes.apple.com/cn/app/Jingxx/id(你的应用id)?mt=8"]];

}

3. 如果是使用 app内嵌套的h5跳转，

function () {

        document.getElementById("update").onclick = function(){

            window.location.href = "itms-apps://itunes.apple.com/cn/app/Jingxx/idxxxxx?mt=8";

        }