iOS APP 比较版本号，检测更新

 

1.获取当前APP的版本号

#pragma mark - 获取APP当前版本号
- (NSString *)getCurrentVersion {
	NSDictionary *infoDict   = [[NSBundle mainBundle] infoDictionary];
	NSString *currentVersion = [infoDict objectForKey:@"CFBundleShortVersionString"];
	NSLog(@"当前版本号：%@",currentVersion);
	return currentVersion;
}

2.获取iTunes App信息

1. 以BundleId获取APP信息：https://itunes.apple.com/lookup?bundleId=你APP的Bundle ID
2. 根据APPID 获取APP信息：http://itunes.apple.com/cn/lookup?id=你的APPID

   NSString  *APP_URL = @"http://itunes.apple.com/cn/lookup?id=1457293407"
	AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
	[manager POST:APP_URL parameters:nil progress:nil success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {

		NSArray *array = [responseObject objectForKey:@"results"];
		NSDictionary *dic = [array firstObject];
		NSString *versionStr   = [dic objectForKey:@"version"];// 版本号
		NSString *trackViewUrl = [dic objectForKey:@"trackViewUrl"];// App Store网址
		NSString *releaseNotes = [dic objectForKey:@"releaseNotes"];//更新日志信息

} failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {

}];

responseObject是个字典{}

results =（）//这是个只有一个元素的数组，里面都是app信息，每个一个元素就是一个字典。里面有各种key。

其中有 trackName （名称）trackViewUrl = （下载地址）version （可显示的版本号）等等

 

3.比较版本号

/**
  比较两个版本号的大小

 @param version APP Store 版本号
 @return 版本号相等,返回NO;大于 返回YES
 */
- (BOOL)compareVesionWithServerVersion:(NSString *)version {
	NSArray *versionArray = [version componentsSeparatedByString:@"."];//拿到iTunes获取App的版本
	NSArray *currentVesionArray = [[self getCurrentVersion] componentsSeparatedByString:@"."];//当前版本
	NSInteger a = (versionArray.count> currentVesionArray.count)?currentVesionArray.count : versionArray.count;
	BOOL haveNew = NO;
	for (int i = 0; i < a; i++) {
		NSInteger a = [[versionArray objectAtIndex:i] integerValue];
		NSInteger b = [[currentVesionArray objectAtIndex:i] integerValue];
		if (a > b) {
			haveNew = YES;
		}else{
			haveNew = NO;
		}
	}
	if (haveNew) {
		NSLog(@"APP store 版本号大于当前版本号：有新版本更新");
	}else{
		NSLog(@"APP store 版本号小于等于当前版本号：没有新版本");
	}
	return haveNew;
}

 

4.完整调用，弹出更新提示窗

#pragma mark -
	//检查更新
- (void)checkUpVersionUpdate {

	AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
	[manager POST:APP_URL parameters:nil progress:nil success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {

		NSArray *array = [responseObject objectForKey:@"results"];
		NSDictionary *dic = [array firstObject];
		NSString *versionStr   = [dic objectForKey:@"version"];// 版本号
		NSString *trackViewUrl = [dic objectForKey:@"trackViewUrl"];// App Store网址
		NSString *releaseNotes = [dic objectForKey:@"releaseNotes"];//更新日志信息

		if (versionStr && ![versionStr isEqualToString:@""]) {//版本存在并且不为空

			if ([self compareVesionWithServerVersion:versionStr]) {//比较版本号

				UIAlertController *alertVC = [UIAlertController alertControllerWithTitle:[NSString stringWithFormat:@"发现新版本:%@\n为了不影响使用请更新到最新版本",versionStr] message:releaseNotes preferredStyle:UIAlertControllerStyleAlert];
// 设置标题和内容的对齐方式

				UIView *subView1 = alertVC.view.subviews[0];
				UIView *subView2 = subView1.subviews[0];
				UIView *subView3 = subView2.subviews[0];
				UIView *subView4 = subView3.subviews[0];
				UIView *subView5 = subView4.subviews[0];
					//分别拿到title 和 message 可以分别设置他们的对齐属性
// 1. 第一种设置方法
//				UILabel *title = subView5.subviews[1];
//				UILabel *message = subView5.subviews[2];
//				title.textAlignment = NSTextAlignmentLeft;
//				message.textAlignment = NSTextAlignmentLeft;

// 1. 第二种设置方法
				NSInteger i = 0;
				for( UIView * view in subView5.subviews ){
					if( [view isKindOfClass:[UILabel class]] ){
						i++;
						if (i==2) {
							UILabel* label = (UILabel*) view;
							label.textAlignment = NSTextAlignmentLeft;
						}

					}

				}

				UIAlertAction *cancelAction  = [UIAlertAction actionWithTitle:@"知道了" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
						//NSLog(@"点击了取消");
				}];

				UIAlertAction *OKAction  = [UIAlertAction actionWithTitle:@"去更新" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
						//NSLog(@"点击了知道了");
					NSURL * url = [NSURL URLWithString:trackViewUrl];//itunesURL = trackViewUrl的内容
					[[UIApplication sharedApplication] openURL:url];
				}];
				[alertVC addAction:cancelAction];
				[alertVC addAction:OKAction];
				[self presentViewController:alertVC animated:YES completion:nil];

			}
			else{
					//当前已是最新版本
			}


		}

	} failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {

	}];

}