iOS APP內部打開蘋果商店的下載頁面封裝

@interface StoreTool : NSObject
+ (instancetype)shareManager;
@end

#import <StoreKit/StoreKit.h>
@interface StoreTool ()
<
SKStoreProductViewControllerDelegate
>
@end

@implementation StoreTool

+ (instancetype)shareManager
{
    static StoreTool * manager =nil;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        if (manager == nil)
        {
            manager = [[self alloc]init];
            [manager showStoreFeromIDstr:@"蘋果商店鏈接裏的ID"];
        }
    });
    return manager;
}

-(void)showStoreFeromIDstr:(NSString *)str
{
    SKStoreProductViewController *vc = [[SKStoreProductViewController alloc] init];
    vc.delegate = self;
    NSDictionary *dic = [NSDictionary dictionaryWithObject:str forKey:SKStoreProductParameterITunesItemIdentifier];
    [vc loadProductWithParameters:dic completionBlock:^(BOOL result, NSError * _Nullable error) {
        if (!error)
        {
            [[self currentViewController] presentViewController:vc animated:YES completion:nil];
        }
        else
        {
            NSLog(@"ERROR:%@", error);
        }
    }];
}

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

//獲取Window當前顯示的ViewController
- (UIViewController*)currentViewController
{
    //獲得當前活動窗口的根視圖
    UIViewController* vc = [UIApplication sharedApplication].keyWindow.rootViewController;
    while (1)
    {
        //根據不同的頁面切換方式，逐步取得最上層的viewController
        if ([vc isKindOfClass:[UITabBarController class]]) {
            vc = ((UITabBarController*)vc).selectedViewController;
        }
        if ([vc isKindOfClass:[UINavigationController class]]) {
            vc = ((UINavigationController*)vc).visibleViewController;
        }
        if (vc.presentedViewController) {
            vc = vc.presentedViewController;
        }else{
            break;
        }
    }
    return vc;
}

@end

// 調用
 [StoreTool shareManager];