iphone - NSDateFormatter - 设置日期格式

Question

我有一个文本字段，用户可以在其中以这种格式插入日期和时间: MMDDHHMM (11230530)，我希望将标签设置为 11 月 23 日凌晨 0530。 我试过:

NSString *data = [NSString stringWithFormat:@"%@", [date text]];

  // Convert string to date object
NSDateFormatter *dateFormatter =[[NSDateFormatter alloc]init];
[dateFormatter setDateFormat:@"MMdd hh:mm"];
NSDate *dateFromString = [dateFormatter dateFromString:data];
NSLog(@"%@", dateFromString);

// Convert date object to desired output format
[dateFormatter setDateFormat:@"???????????"];// I don't know how to change the format ;-)
data = [dateFormatter stringFromDate:dateFromString]; 
NSLog(@"%@", data);
[dateFormatter release];

但我从数据中得到的是空值。有什么线索吗？

Answer 1

使用此代码，

NSString *date = [NSString stringWithFormat:@"11230530"];
NSDateFormatter *dateFormatter =[[NSDateFormatter alloc]init];
[dateFormatter setDateFormat:@"MMddHHmm"];

NSDate *dateFromString = [dateFormatter dateFromString:date];
NSLog(@"%@", dateFromString);
[dateFormatter release];

dateFormatter =[[NSDateFormatter alloc]init];
[dateFormatter setDateFormat:@"dd MMMM' at 'hhmm a"];
NSString *stringFromDate=[dateFormatter stringFromDate:dateFromString];
//Use this text to display in that textfield
[dateFormatter release];