iOS App 版本检测升级

只需要知道自己的app ID,就可以使用版本检测升级功能。

首先，根据app ID获取app在app store上的相关信息，然后拿到自己本地的版本号，和app store上获取的版本号比较，如果本地版本号较低，则提醒需要更新，展示app store上最新的版本号和最近的更新内容，最后，如果用户点击更新就跳转到app store上app对应界面进行更新。（另，因为当时要封装成静态库，网络请求用的是苹果自带的，可以换成afn）

根据app ID获取app store上app的信息

+(void)checkVersionUpdate:(NSString *)appId {
    //定义的app的地址
    //country 上架国家(全部国家可不写) id appId。
    NSString *urld = [NSString stringWithFormat:@"https://itunes.apple.com/lookup?country=cn&id=%@", appId];
    NSURL *url = [NSURL URLWithString:urld];
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestReloadIgnoringLocalCacheData timeoutInterval:10];
    [request setHTTPMethod:@"GET"];
    
    NSURLSession *session = [NSURLSession sharedSession];
    
    NSURLSessionDataTask *task = [session dataTaskWithURL:url completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
        
        NSMutableDictionary *receiveStatusDic = [[NSMutableDictionary alloc] init];
        if (data) {
            NSDictionary *receiveDic = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves|NSJSONReadingMutableContainers|NSJSONReadingAllowFragments error:nil];
            NSArray *array =receiveDic[@"results"];
            if (array.count == 0) {
                return ;
            }
            //获取appstore最新版本号
            NSString *version = [array[0] objectForKey:@"version"];
            //获取更新信息
            NSString *note = [array[0] objectForKey:@"releaseNotes"];
            
            if ([version intValue]>0) {
                [receiveStatusDic setValue:@"-1" forKey:@"status"];
                [receiveStatusDic setValue:version forKey:@"version"];
                [receiveStatusDic setValue:note forKey:@"note"];
                [receiveStatusDic setValue:appId forKey:@"appId"];
                //请求的有数据，进行版本比较
                [self performSelectorOnMainThread:@selector(receiveData:) withObject:receiveStatusDic waitUntilDone:YES];
            } else {
                [receiveStatusDic setValue:@"-1" forKey:@"status"];
            }
        } else {
            [receiveStatusDic setValue:@"-1" forKey:@"status"];
        }
        
        
    }];
    
    [task resume];
}

app store获取的版本号和本地版本号比较

+ (void)receiveData:(id)sender {
    //获取APP自身版本号
    NSString *localVersion = [[[NSBundle mainBundle]infoDictionary]objectForKey:@"CFBundleShortVersionString"];
    
    NSArray *localArray = [localVersion componentsSeparatedByString:@"."];
    NSArray *versionArray = [sender[@"version"] componentsSeparatedByString:@"."];
    
    //比较
    NSUInteger count = versionArray.count;
    if (versionArray.count > localArray.count) {
        count = localArray.count;
    }
    for (int i = 0; i < count; i++) {
        if ([localArray[i] intValue] < [versionArray[i] intValue]) {
            [self alertUpdateVersion:sender];
            return;
        }
        //审核时本地大于线上,开发时也有可能
        if ([localArray[i] intValue] > [versionArray[i] intValue]) {
            NSLog(@"本地版本大于线上");
            return;
        }
    }
    //出现了1.2和1.2.3的情况,肯定是长的那个是高版本,因为不存在1.2和1.2.0对比的情况
    if (versionArray.count > localArray.count) {
        [self alertUpdateVersion:sender];
        return;
    }
    
    NSLog(@"目前没有新版本");
}

更新提示

+ (void)alertUpdateVersion:(NSMutableDictionary *)dic{
    [dic setValue:@"1" forKey:@"status"];
    
    NSString *alertStr = [NSString stringWithFormat:@"检测到较新版本%@。更新内容:\n%@\n\n是否需要进行更新?",dic[@"version"],dic[@"note"]];
    
    UIAlertController *alertVC = [UIAlertController alertControllerWithTitle:@"版本检测" message:alertStr preferredStyle:(UIAlertControllerStyleAlert)];
    
    UIAlertAction *action = [UIAlertAction actionWithTitle:@"是的" style:(UIAlertActionStyleDefault) handler:^(UIAlertAction * _Nonnull action) {
        [self goToUpdate:dic[@"appId"]];
    }];
    [alertVC addAction:action];
    
    if ([dic[@"updateFlag"] integerValue] == UpdateOptional){
        UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"不，谢谢" style:(UIAlertActionStyleCancel) handler:^(UIAlertAction * _Nonnull action) {}];
        [alertVC addAction:cancelAction];
    }
    
    [[self getCurrentViewController] presentViewController:alertVC animated:false completion:nil];
}

获取当前视图的活动页面

+ (UIViewController *)getCurrentViewController {
    UIViewController *root = [UIApplication sharedApplication].keyWindow.rootViewController;
    UIViewController *currentVC = [self GetNextVC:root];
    
    return currentVC;
}

//使用的递归方法
+ (UIViewController *)GetNextVC:(UIViewController *)rootVC

{
    UIViewController *currentVC;
    if ([rootVC presentedViewController]) {
        rootVC = [rootVC presentedViewController];
    }
    
    //    UITabBarController
    if ([rootVC isKindOfClass:[UITabBarController class]]) {
        currentVC = [self GetNextVC:[(UITabBarController *)rootVC selectedViewController]];
    }
    //    UINavigationController
    else if ([rootVC isKindOfClass:[UINavigationController class]]){
        currentVC = [self GetNextVC:[(UINavigationController *)rootVC visibleViewController]];
    }
    //    普通的ViewController
    else {
        currentVC = rootVC;
    }
    return currentVC;
    
}

跳转到app store更新

+ (void)goToUpdate:(NSString *)appId {
    //跳转地址链接
    NSString *str = [NSString stringWithFormat: @"itms-apps://itunes.apple.com/cn/app/id%@?mt=8", appId];
    UIApplication *app = [UIApplication sharedApplication];
    NSURL *url = [NSURL URLWithString:str];
    if ([app canOpenURL:url]) {
        if (@available(iOS 10.0,*)) {
            [app openURL:url options:@{} completionHandler:nil];
        } else {
            [app openURL:url];
        }
    }
}