iOS 企业版应用一键更新

如果后台没有获取版本号的接口，自己就直接从下载企业版应用指向的 plist 文件中获取吧，如果有，就不用这么麻烦还要去下载整个 plist 文件了，直接根据拿到的版本好与本地对比即可。

#pragma mark -
#pragma mark 检查更新
- (void)checkForUpdating {
    // 先清空之前下载的缓存文件
    NSString *tmpDirectory = NSTemporaryDirectory();
    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSError *error;
    NSArray *cacheFiles = [fileManager contentsOfDirectoryAtPath:tmpDirectory error:&error];
    for (NSString *file in cacheFiles) {
        error = nil;
        [fileManager removeItemAtPath:[tmpDirectory stringByAppendingPathComponent:file] error:&error];
    }
    
    // 从服务器下载plist文件
    NSURLRequest *downloadRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:CheckUpdatingPlistUrl]];
    NSURLSessionConfiguration *sessionConfig = [NSURLSessionConfiguration defaultSessionConfiguration];
    NSURLSession *urlSession = [NSURLSession sessionWithConfiguration:sessionConfig delegate:nil delegateQueue:nil];
    NSURLSessionDownloadTask *task = [urlSession downloadTaskWithRequest:downloadRequest completionHandler:^(NSURL * _Nullable location, NSURLResponse * _Nullable response, NSError * _Nullable error) {
        if (error) {
            WJLog(@"获取下载服务器版本失败:\n%@", error.localizedDescription);
        }
        else {
            NSDictionary *dict = [NSDictionary dictionaryWithContentsOfURL:location];
            // 服务器版本号
            NSString *serverVersion = dict[@"items"][0][@"metadata"][@"bundle-version"];
            
            // 本地版本号
            NSString *localVersion = [[NSBundle mainBundle] infoDictionary][@"CFBundleShortVersionString"];
            
            // 对比版本号，升序
            if ([localVersion compare:serverVersion options:NSNumericSearch] == NSOrderedAscending) {
                
                dispatch_async(dispatch_get_main_queue(), ^{
                     // 先提示安装
                    FCAlertView *alert = [[FCAlertView alloc] init];
                    [alert showAlertWithTitle:@"提示" withSubtitle:@"新版本已发布，点击确定开始更新" withCustomImage:nil withDoneButtonTitle:nil andButtons:nil];
                    alert.hideDoneButton = YES;
                    alert.bounceAnimations = YES;
                    alert.colorScheme = alert.flatOrange;
                    [alert makeAlertTypeCaution];
                    alert.subTitleColor = [UIColor redColor];
                    [alert addButton:@"确定" withActionBlock:^{
                        
                       // 模拟器不支持
                        if (TARGET_IPHONE_SIMULATOR) { WJLog(@"模拟器不支持该操作"); return; }
                        // 真机执行安装
                        NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"itms-services://?action=download-manifest&url=%@", CheckUpdatingPlistUrl]];
                        [[UIApplication sharedApplication] openURL:url];
                        
                        // 动画退出App
                        UIWindow *window = [UIApplication sharedApplication].keyWindow;
                        [UIView animateWithDuration:.5f animations:^{
                            window.alpha = 0;
                            CGFloat width = window.bounds.size.width;
                            CGFloat height = window.bounds.size.height;
                            window.frame = CGRectMake(width * 0.5, height * 0.5, 0, 0);
                        } completion:^(BOOL finished) {
                            exit(0);
                        }];
                        
                    }];
                    [alert addButton:@"下次再说" withActionBlock:nil];
                });
            }
        }
    }];
    [task resume];
}

那个 FCAlertView 没有可以用原生的，比如：

// 对比版本号，升序
if ([localVersion compare:serverVersion options:NSNumericSearch] == NSOrderedAscending) {
    __weak typeof(self) weakSelf = self;
    dispatch_async(dispatch_get_main_queue(), ^{
        // 先提示安装
        UIAlertController *alertVc = [UIAlertController alertControllerWithTitle:@"提示" message:@"新版本已发布，点击确定开始更新" preferredStyle:UIAlertControllerStyleAlert];
        UIAlertAction *confirmAct = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
            
            // 模拟器不支持
            if (TARGET_IPHONE_SIMULATOR) { WJLog(@"模拟器不支持该操作"); return; }
            // 真机执行安装
            NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"itms-services://?action=download-manifest&url=%@", CheckUpdatingPlistUrl]];
            [[UIApplication sharedApplication] openURL:url];
            
            // 动画退出App
            UIWindow *window = [UIApplication sharedApplication].keyWindow;
            [UIView animateWithDuration:.5f animations:^{
                window.alpha = 0;
                CGFloat width = window.bounds.size.width;
                CGFloat height = window.bounds.size.height;
                window.frame = CGRectMake(width * 0.5, height * 0.5, 0, 0);
            } completion:^(BOOL finished) {
                exit(0);
            }];
            
        }];
        
        // 取消
        UIAlertAction *cancelAct = [UIAlertAction actionWithTitle:@"下次再说" style:UIAlertActionStyleDefault handler:nil];
        
        [alertVc addAction:confirmAct];
        [alertVc addAction:cancelAct];
        
        [weakSelf.window.rootViewController presentViewController:alertVc animated:YES completion:nil];
    });
}