iOS开发强制&推荐更新

2021-07-13  本文已影响0人  铁头娃_e245

因为项目里需要判断当前版本是否需要更新,可更新范围是一个区间,所以封装了如下方法来判断当前版本是否在更新区间中。(有一个缺陷是更新的版本号的长度不能大于本地版本号长度,否则判断会有遗漏)

通过服务器数据判断本地与远端最新版是否一致

方案1:自己去实现判断逻辑,遍历字段逐一校验

//判断版本号,输出YES(更新) 输出NO(无需更新)
- (BOOL)compareEditionMinNumber:(NSString *)serverMinNumberStr maxNumber:(NSString *)serverMaxNumberStr {
    //获取本地的软件版本号
    NSString *localNumberStr = [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleShortVersionString"];
    NSArray *minArray = [serverMinNumberStr componentsSeparatedByString:@"."]; //从字符A中分隔
    NSArray *maxArray = [serverMaxNumberStr componentsSeparatedByString:@"."]; //从字符A中分隔
    NSArray *localArray = [localNumberStr componentsSeparatedByString:@"."]; //从字符A中分隔
    
    //先判断本地版本和最低更新版本号的逻辑
    for (int i=0; i<localArray.count; i++) {
        NSString *str = localArray[i];
        int localNum = [str intValue];
        if (!localNum) {
            localNum = 0;
        }
        
        if (minArray.count > i) {
            int minNum = [minArray[i] intValue];
            if (!minNum) {
                minNum = 0;
            }
            
            if (localNum > minNum) {
                //符合预期且不用判断后续小版本号,跳出整个循环
                break;
            }
            if (localNum == minNum) {
                //说明符合预期且需要判断后续小版本号,跳出本次循环
                continue;
            }
            if (localNum < minNum) {
                //如果小于最小版本号,直接return
                return NO;
            }
        }else{
            continue;
        }
    }
    
    
    //再判断本地版本和最高更新版本号的逻辑
    for (int i=0; i<localArray.count; i++) {
        NSString *str = localArray[i];
        int localNum = [str intValue];
        if (!localNum) {
            localNum = 0;
        }
        
        if (maxArray.count > i) {
            int maxNum = [maxArray[i] intValue];
            if (!maxNum) {
                maxNum = 0;
            }
            
            if (localNum < maxNum) {
                //符合预期且不用判断后续小版本号,跳出整个循环
                break;
            }
            if (localNum == maxNum) {
                //说明符合预期且需要判断后续小版本号,跳出本次循环
                continue;
            }
            if (localNum > maxNum) {
                //如果大于最大版本号,直接return
                return NO;
            }
        }else{
            continue;
        }
    }
    
    //如果循环逻辑都通过了,说明全部字段符合预期
    return YES;
}

方案2:也可以用系统的判断字符串的方法(应用举例)

    // 获取当前版本号
    NSDictionary *infoDic = [[NSBundle mainBundle] infoDictionary];
    NSString *appVersion = [infoDic objectForKey:@"CFBundleShortVersionString"];
    if ([appVersion compare:serverVersion options:NSNumericSearch] == NSOrderedAscending) {
        UIAlertView *alert;
        alert = [[UIAlertView alloc] initWithTitle:@"有新版本,是否升级!"
                                           message:message
                                          delegate: self
                                 cancelButtonTitle:@"取消"
                                 otherButtonTitles: @"升级", nil];
        alert.tag = 20;
        [alert show];
    }else{
        NSLog(@"没有新版本");
    }

参数定义

options:(NSStringCompareOptions)
传入 NSStringCompareOptions 枚举的值
enum{
    NSCaseInsensitiveSearch = 1,//不区分大小写比较
    NSLiteralSearch = 2,//区分大小写比较
    NSBackwardsSearch = 4,//从字符串末尾开始搜索
    NSAnchoredSearch = 8,//搜索限制范围的字符串
    NSNumbericSearch = 64//按照字符串里的数字为依据,算出顺序。例如 Foo2.txt < Foo7.txt < Foo25.txt
//以下定义高于 mac os 10.5 或者高于 iphone 2.0 可用
    ,
    NSDiacriticInsensitiveSearch = 128,//忽略 "-" 符号的比较
    NSWidthInsensitiveSearch = 256,//忽略字符串的长度,比较出结果
    NSForcedOrderingSearch = 512//忽略不区分大小写比较的选项,并强制返回 NSOrderedAscending 或者 NSOrderedDescending
//以下定义高于 iphone 3.2 可用
    ,
    NSRegularExpressionSearch = 1024//只能应用于 rangeOfString:..., stringByReplacingOccurrencesOfString:...和 replaceOccurrencesOfString:... 方法。使用通用兼容的比较方法,如果设置此项,可以去掉 NSCaseInsensitiveSearch 和 NSAnchoredSearch
}

range:(NSRange)
比较字符串的范围
 结构变量:
location: 需要比较的字串起始位置(以0为起始)
length: 需要比较的字串长度
 
返回值:
typedef enum _NSComparisonResult {
     NSOrderedAscending = -1,    // < 升序
     NSOrderedSame,              // = 等于
     NSOrderedDescending   // > 降序
} NSComparisonResult;

比较App Store版本和本地是否一致

- (void)updateVersionAction {
    //checkVersion
    NSString *url = @"http://itunes.apple.com/cn/lookup?id=1576843916";
    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
    manager.requestSerializer = [AFJSONRequestSerializer serializer];
    manager.responseSerializer = [AFJSONResponseSerializer serializer];
    manager.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"text/javascript", nil];
    [manager POST:url parameters:nil success:^(NSURLSessionDataTask *task, id responseObject) {
        NSArray *results = responseObject[@"results"];
        if (results.count > 0) {
            NSString *serverVersion = responseObject[@"results"][0][@"version"];//获取版本号
            
            // 获取当前版本号
            NSString *appVersion = [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleShortVersionString"];
            //判断本地版本与App Store版本是否一致
            if ([appVersion compare:serverVersion options:NSNumericSearch] == NSOrderedAscending) {
                UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"有新版本,是否升级!" message:nil preferredStyle:UIAlertControllerStyleAlert];
                UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
                    
                }];
                [alertController addAction:cancelAction];
                UIAlertAction *comfirmAction = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
                    // 无权限 引导去开启
                    if ([[UIApplication sharedApplication]canOpenURL:[NSURL URLWithString:url]]) {
                        [[UIApplication sharedApplication]openURL:[NSURL URLWithString:url]];
                    }
                }];
                [alertController addAction:comfirmAction];
                [self presentViewController:alertController animated:YES completion:nil];
            }else{
                [Toast toast:@"当前已是最新版本" toView:self.view];
            }
        }else{
            [Toast toast:@"请去App Store查看是否有更新" toView:self.view];
        }
    } failure:^(NSURLSessionDataTask *task, NSError *error) {
        [Toast toast:@"获取App Store最新版本失败" toView:self.view];
    }];
}
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