ios 版本更新提示-硬更新/软更新

实现：

强制更新：每次弹框

非强制更新：一天提示一次

代码如下:

步骤一：将检测更新写到APPDelegate的applicationDidBecomeActive中

步骤二：检测是否需要更新

步骤三：针对非强制更新-首先判断日期如果是同一天的话就不提示更新，如果不是同一天可以提示更新

逻辑如下：前边是之前的逻辑简单解释一下：0代表未提示更新 1代表已经提示更新存日期表示将日期存到内存中

前边是第一次的逻辑，后边是写代码时候的逻辑，更简化了一些

下边附上核心代码：

- (void)compareVersionLocalVerson:(NSString *)localVerson appVerson:(NSString *)appVerson andtype:(NSInteger)type andURl:(NSString *)url{
    
    //将版本号按照.切割后存入数组中
    NSArray *localArray = [localVerson componentsSeparatedByString:@"."];
    NSArray *appArray = [appVerson componentsSeparatedByString:@"."];
    NSInteger minArrayLength = MIN(localArray.count, appArray.count);
    BOOL needUpdate = NO;
    
    for(int i=0;i<minArrayLength;i++){//以最短的数组长度为遍历次数,防止数组越界
        
        //取出每个部分的字符串值,比较数值大小
        NSString *localElement = localArray[i];
        NSString *appElement = appArray[i];
        
        NSInteger  localValue =  localElement.integerValue;
        
        NSInteger  appValue = appElement.integerValue;
        
        if(localValue<appValue) {
            //从前往后比较数字大小,一旦分出大小,跳出循环
            needUpdate = YES;
            break;
        }else if(localValue>appValue){
            needUpdate = NO;
            break;
        }
        
    }
    if (needUpdate) {
        if (type == 1) {//强制更新
            
            [self showForceUpdate];
            
        }else{
            NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
            [formatter setDateFormat:@"yyyy-MM-dd"];
            NSString *nowday = [formatter stringFromDate:[NSDate date]];
            NSString *saveDay = [UserDefaults objectForKey:@"versionUpdateKey"];
            if (saveDay == nil) {
                saveDay = @"";
            }
            
            if (![saveDay isEqualToString:nowday]) { //假如不是同一天，更新存储的日期，并且把isHadShowUpdate 设置成yes

                [self canChooseUpdate];
                
                [UserDefaults setObject:@"1" forKey:@"isHadShowUpdate"];
                [UserDefaults setObject:nowday forKey:@"versionUpdateKey"];
                
            }else{//如果是同一天的话
                return;
//                if([IsHadShowUpdate  isEqualToString:@"0"]){
//                    [self canChooseUpdate];
//                    [UserDefaults setObject:@"1" forKey:@"isHadShowUpdate"];
//                    [UserDefaults setObject:nowday forKey:@"versionUpdateKey"];
//                }else{
//                   return;
//                }
  
            }
        }
        
        
    }else{
        
    }
}

非强制更新代码

//可选更新
-(void)canChooseUpdate{
    //弹出提示更新弹框
    UIAlertController *alertVc = [UIAlertController alertControllerWithTitle:@"亲，有新版本了" message:@"更稳定、快速、多彩的功能和体验，点击立即更新！" preferredStyle:UIAlertControllerStyleAlert];
    //
    UIAlertAction *action2 = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        
    }];
    
    UIAlertAction *action1 = [UIAlertAction actionWithTitle:@"更新" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        
        NSString *JumpURL = [[NSUserDefaults standardUserDefaults]objectForKey:@"AppURL"];
        
        if(JumpURL.length ==0){
            [JKToast showWithText:@"参数错误"];
            return;
        }else{
            [[UIApplication sharedApplication] openURL:[NSURL URLWithString:JumpURL]];
            AppDelegate *app = appDelegate;
            UIWindow *window = app.window;
            
            [UIView animateWithDuration:1.0f animations:^{
                window.alpha = 0;
                window.frame = CGRectMake(0, window.bounds.size.width, 0, 0);
            } completion:^(BOOL finished) {
                exit(0);
            }];
        }
        
    }];
    
    
    
    [alertVc addAction:action2];
    [alertVc addAction:action1];
    
    
    
    UIViewController *vc = [UIApplication sharedApplication].delegate.window.rootViewController;
    [vc presentViewController:alertVc animated:YES completion:nil];
}