iOS自動檢測版本更新

雖然蘋果官方是不容許應用自動檢測更新,提示用戶下載,由於蘋果會提示你有多少個軟件須要更新,可是有的時候提示用戶一下有新版仍是頗有必要的。服務器

 

首先說一下原理:app

每一個上架的蘋果應用程序,都會有一個應用程序的ID,根據這個ID咱們就能夠獲取到當前程序的最新版本號,而後和本身的版本號做比較,若是同樣的話就是最新版,反之就不是新版,就能夠提示用戶來手動下載最新版的程序。由於有ID因此就能夠定位到這個APP,點擊下載便可。url

 

源碼:spa

通常建議檢測更新的代碼放到主頁控制器裏。代理

首先還要導入一個頭文件用來打開AppStore下載更新code

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

接着還有代理component

SKStoreProductViewControllerDelegate

而後開始檢測更新orm

//檢測版本,版本更新
    NSError *error;
    NSString *urlStr = @"http://itunes.apple.com/lookup?id=上架AppID";
    NSURL *url = [NSURL URLWithString:urlStr];
    NSURLRequest *request = [NSURLRequest requestWithURL:url];
    NSData *response = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
    NSDictionary *appInfoDict = [NSJSONSerialization JSONObjectWithData:response options:NSJSONReadingMutableLeaves error:&error];
    if (error)
    {
        return;
    }
    NSArray *resultArray = [appInfoDict objectForKey:@"results"];
    if (![resultArray count])
    {
        return;
    }
    
    NSDictionary *infoDict = [resultArray objectAtIndex:0];
    //獲取服務器上應用的最新版本號
    NSArray* arr=[infoDict[@"version"] componentsSeparatedByString:@"."];
    NSInteger updateVersion=0;
    for (int i=0; i<arr.count; i++)
    {
        if(i==0)
        {
            updateVersion+=[arr[i] integerValue]*1000;
        }
        else if (i==1)
        {
            updateVersion+=[arr[i] integerValue]*100;
        }
        else if (i==2)
        {
            updateVersion+=[arr[i] integerValue]*10;
        }
        else if (i==3)
        {
            updateVersion+=[arr[i] integerValue]*1;
        }
    }
    NSString *trackName = infoDict[@"trackName"];
    _trackViewUrl = infoDict[@"trackViewUrl"];
//獲取當前設備中應用的版本號
    NSDictionary *infoDic = [[NSBundle mainBundle] infoDictionary];
    NSArray* arr2=[[infoDic objectForKey:@"CFBundleShortVersionString"] componentsSeparatedByString:@"."];
    NSInteger currentVersion=0;
    
    for (int i=0; i<arr2.count; i++)
    {
        if(i==0)
        {
            currentVersion+=[arr2[i] integerValue]*1000;
        }
        else if (i==1)
        {
            currentVersion+=[arr2[i] integerValue]*100;
        }
        else if (i==2)
        {
            currentVersion+=[arr2[i] integerValue]*10;
        }
        else if (i==3)
        {
            currentVersion+=[arr2[i] integerValue]*1;
        }
    }
    
    //判斷兩個版本是否相同
    if (currentVersion < updateVersion)
    {
        NSString *titleStr = [NSString stringWithFormat:@"檢查更新:%@", trackName];
        NSString *messageStr = [NSString stringWithFormat:@"發現新版本%@,是否更新", infoDict[@"version"]];
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:titleStr message:messageStr delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"升級", nil];
     //爲了區分其餘彈出框而已 alert.tag
= 1112427256; [alert show]; }

 

接着就是用戶更不更的問題了blog

 

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
    
    if (alertView.tag == 1112427256)
    {
        if (buttonIndex == 1)
        {
            //點擊」升級「按鈕,就從打開app store上應用的詳情頁面
            SKStoreProductViewController *storeProductVC = [[SKStoreProductViewController alloc] init];
            storeProductVC.delegate = self;
            NSDictionary *dict = [NSDictionary dictionaryWithObject:@"上架AppID" forKey:SKStoreProductParameterITunesItemIdentifier];
            [storeProductVC loadProductWithParameters:dict completionBlock:^(BOOL result, NSError *error)
             {
                 if (result)
                 {
                     [self presentViewController:storeProductVC animated:YES completion:nil];
                 }
             }];
        }
    }
}

還有就是用戶打開AppStore可是沒有下載就返回回來的情況源碼

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

OK到這裏就結束了。這樣的話就能夠檢測App是否是最新版了,並且用戶也能實時看到,最關鍵的是蘋果審覈還能經過。

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