iOS两个日期之间转换

产品有个需求,显示指定日期格式,这个日期又特么是后端胡乱给的,没法子,自己转,直接上代码

- (NSString *)getDate:(NSString *)date withDateStyle(NSString *)dateStyle
{
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    NSTimeZone *timeZone = [NSTimeZone timeZoneWithName:@"GMT"];
    NSLocale *local=[[NSLocale alloc]initWithLocaleIdentifier:@"en_US_POSIX"];
    [formatter setLocale:local];//需要配置区域，不然会造成模拟器正常，真机日期为null的情况
    [formatter setTimeZone:timeZone];
    [formatter setDateFormat:@"yyyy/MM/dd HH:mm:ss"];// 设置源时间字符串的格式
    NSDate *date1 = [formatter dateFromString:date];
//    NSLog(@"date--%@___class---%@",date1,[date1 class]);
    NSDateFormatter* toformatter = [[NSDateFormatter alloc] init];
    [toformatter setDateStyle:NSDateFormatterMediumStyle];
    [toformatter setTimeStyle:NSDateFormatterShortStyle];
    [toformatter setDateFormat: dateStyle];//设置目标时间字符串的格式
    NSString *targetTime = [toformatter stringFromDate:date1];//将时间转化成目标时间字符串
    XHLog(@"%@",targetTime);
    
    return targetTime;
}

就这些,那好不送