ios 显示其他app的购买页面

using UnityEngine;
using System.Collections;
using System.Runtime.InteropServices ;

public class IOSDoor : MonoBehaviour {

    // Use this for initialization
    void Start () {

    }

    // Update is called once per frame
    void Update () {

    }

    [DllImport("__Internal")]
    private static extern void ShowBook ( int  bookid );

    public static void ActivateButton0 ()
    {
        Debug.Log ();
        if (Application.platform != RuntimePlatform.OSXEditor)
        {
            //点击按钮后调用xcode中的 _PressButton0 ()方法，
            //方法中的内容须要我们自己来添加
            ShowBook ();
        }
    }

    [DllImport("__Internal")]
    private static extern void _ShowBookApp ( string  bookid );

    public static void ShowBookApp (string  bookid )
    {
        Debug.Log ( + "ShowBookStr" + bookid);
        if (Application.platform != RuntimePlatform.OSXEditor)
        {
            //点击按钮后调用xcode中的 _PressButton0 ()方法，
            //方法中的内容须要我们自己来添加
            _ShowBookApp ("");
        }
    }

}

- (BOOL)application:(UIApplication*)application didFinishLaunchingWithOptions:(NSDictionary*)launchOptions
{
     
..............................

    NSLog(@"eeee") ;
    UnityViewController  *    uv =  [[UnityViewController alloc] init] ;
    //[uv.view setFrame:CGRectMake(0, 200, 320, 200)];
    //uv.view.backgroundColor = [UIColor blackColor];
    [UnityGetGLViewController().view addSubview:uv.view] ;

    [UnityViewController setInstance:uv];

    return YES;
}

//
//  UnityViewController.h
//  Unity-iPhone
//
//  Created by lc—— on 16/6/13.
//
//

#import <UIKit/UIKit.h>
#import <StoreKit/StoreKit.h>

@interface UnityViewController : UIViewController<SKStoreProductViewControllerDelegate>

- (void)showStoreProductInApp:(NSString *)appID ;
+(void) setInstance: ( UnityViewController *) inst ;
+(UnityViewController *)  getInstance ;
@end

//
//  UnityViewController.m
//  Unity-iPhone
//
//  Created by lc—— on 16/6/13.
//
//

#import "UnityViewController.h"

@interface UnityViewController ()

@end

@implementation UnityViewController

void ShowBook(  int  bookID )
{
    NSLog(@"rrrrr") ;
  //[[UnityViewController getInstance] showStoreProductInApp:@"1073005459"];
    [[UnityViewController getInstance] showStoreProductInApp:[NSString stringWithFormat:@"%d" , bookID]];
}
void _ShowBookApp( const char *  bookID )
{
    NSString * bookIDStr = [NSString stringWithUTF8String:bookID] ;
    NSLog(@"rrrr r --- %@" , bookIDStr) ;
    [[UnityViewController getInstance] showStoreProductInApp:@""];
   // NSString * bookIDStr = [NSString stringWithUTF8String:bookID] ;
    //[[UnityViewController getInstance] showStoreProductInApp:bookIDStr];
}

void _ShowBookStar( const char *  bookID )
{
    NSLog(@"rrrrr") ;
   // //[[UnityViewController getInstance] showStoreProductInApp:@"1073005459"];
  NSString * bookIDStr = [NSString stringWithUTF8String:bookID] ;
 [[UnityViewController getInstance] loadAppStoreController:bookIDStr];
}

static  UnityViewController * instance ;
+(UnityViewController *)  getInstance
{
    return instance ;
}

+(void) setInstance: ( UnityViewController *) inst
{
    instance = inst ;
}

- (void)viewDidLoad {
    [super viewDidLoad];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (void)loadAppStoreController:(NSString *)appID

{

    NSLog(@"rrrrr--loadAppStoreController") ;
    // 初始化控制器

    SKStoreProductViewController *storeProductViewContorller = [[SKStoreProductViewController alloc] init];

    // 设置代理请求为当前控制器本身

    storeProductViewContorller.delegate = self;

    [storeProductViewContorller loadProductWithParameters:@{SKStoreProductParameterITunesItemIdentifier:appID}  completionBlock:^(BOOL result, NSError *error)   {

        if(error)

        {

            NSLog(@"error %@ with userInfo %@",error,[error userInfo]);

        }  else

        {

            // 模态弹出appstore  

            [self presentViewController:storeProductViewContorller animated:YES completion:^{  

            }];  

        }  

    }];  

}

- (void)showStoreProductInApp:(NSString *)appID{

    Class isAllow = NSClassFromString(@"SKStoreProductViewController");

    NSLog(@"ttt") ;

    if (isAllow != nil) {

        SKStoreProductViewController *sKStoreProductViewController = [[SKStoreProductViewController alloc] init];
        [sKStoreProductViewController.view setFrame:CGRectMake(, , , )];
        [sKStoreProductViewController setDelegate:self];
        [sKStoreProductViewController loadProductWithParameters:@{SKStoreProductParameterITunesItemIdentifier: appID}
                                                completionBlock:^(BOOL result, NSError *error) {
                                                    if (result) {
                                                        [self presentViewController:sKStoreProductViewController
                                                                           animated:YES
                                                                         completion:nil];
                                                        // [self removeNotice];

                                                    }else{
                                                        NSLog(@"error:%@",error);
                                                    }
                                                }];
    }else{
        //低于iOS6的系统版本没有这个类,不支持这个功能
        NSString *string = [NSString stringWithFormat:@"itms-apps://itunes.apple.com/xxxxxxx/app/id%@?mt=8",appID];
        [[UIApplication sharedApplication] openURL:[NSURL URLWithString:string]];
    }
}

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

/*
#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    // Get the new view controller using [segue destinationViewController].
    // Pass the selected object to the new view controller.
}
*/

@end