Question

我正在获取一系列值，包括来自服务器的日期。当我在tableview中显示日期时，我需要更改格式。所以这是我的数组：

{
    amount = "-651.5700"; 
    "date_added" = "2014-04-14 03:03:10";
    description = "Order Amount Paid ";
    "transaction_id" = 795;
},  {
    amount = "-1985.0700";
    "date_added" = "2014-04-14 03:03:10";
    description = "Order Amount Paid ";
    "transaction_id" = 794;
}

我用cellForRowAtIndexPath方法在表格视图中显示日期的代码是：

 NSString *str=[[[ArrDashboard objectAtIndex:indexPath.row] objectForKey:@"date_added"] copy];
  [dateFormatter setDateFormat:@"yyyy-MM-dd hh:mm:ss"]; 
  NSDate *date = [dateFormatter dateFromString:str];  
  [dateFormatter setDateFormat:@"MM/dd/yyyy"]; 
  NSString *strMyDate= [dateFormatter stringFromDate:date];
  cell.LblDate.text = [NSString stringWithFormat:@"%@",strMyDate];

我在数组中得到很多值，但在转换后，其中一些值为null，有些是转换后的日期字符串如果有人可以提供帮助，那将会很有用谢谢。

Answer 1

    NSString *str=[[[ArrDashboard objectAtIndex:indexPath.row] objectForKey:@"date_added"] copy]; 
   [dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"]; 
    NSDate *date = [dateFormatter dateFromString:str]; 
    [dateFormatter setDateFormat:@"MM/dd/yyyy"]; 
    NSString *strMyDate= [dateFormatter stringFromDate:date]; 
    cell.LblDate.text = [NSString stringWithFormat:@"%@",strMyDate];

您的日期格式对于您从回复中提取的日期格式是错误的

Answer 2

Alloc you dateformatter试试这段代码完美无缺

    NSString *str=@"2014-04-14 03:03:10";
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"yyyy-MM-dd hh:mm:ss"];
NSDate *date = [dateFormatter dateFromString:str];
[dateFormatter setDateFormat:@"MM/dd/yyyy"];
NSString *strMyDate= [dateFormatter stringFromDate:date];
NSString *strResult = [NSString stringWithFormat:@"%@",strMyDate];

在uitableview cellForRowAtIndexPath方法中使用nadateformatter时，日期值变为null

2 个答案: