iphone - NSDateFormatter Does not convert correctly

Question

I have a NSString which is passed from an xml feed........

NSString *strDate =@"Thu, 22 Apr 2010 10.30 am CEST";

I'm currently using this code to format the date........

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:@"EEE, dd MMM yyyy hh:mm a vvvv"];
    NSDate *myDate = [dateFormatter dateFromString:date];
    [dateFormatter setDateFormat:@"HH"];
    NSLog(@"%@", [dateFormatter stringFromDate:myDate]);

I want to format my string only to display only hours and currently I'm getting value like this.

strDate =@"2010-04-10 14:00:00 +0530";

Can anyone please help me with this?......

---

I'm sorry.It's my mistake.It should be like this.

NSString *strDate =@"Thu, 22 Apr 2010 10:30 am CEST";

What my requirement is to get hour part only from above string using NSDateFormatter. How can I achieve that. Sorry for the earlier mistake.

Thanks.

Answer 1

如果您想获得 10:30 的 10 点（如果您的要求），那么您可以这样做：

strDate = @"Thu, 22 Apr 2010 10:30 am CEST";
NSArray *dateComponents = [strDate componentsSeparatedByString:@" "];
NSString *requiredString = [dateComponents objectAtIndex:4];
dateComponents = [requiredString componentsSeparatedByString:@":"];
requiredString = [dateComponents objectAtIndex:0];

当你这样做时：

NSLog(rquiredString);

输出： 10；

这只是一种解决方法，为了更好的方法，您应该通过NSDateComponents 类。

希望这可以帮助。

谢谢，

马杜普

Answer 2

你想这样做：

NSString *strDate =@"Thu, 22 Apr 2010 10:30 am CEST";

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"EEE, dd MMM yyyy hh:mm a"];
NSDate *myDate = [dateFormatter dateFromString:strDate];
[dateFormatter setDateFormat:@"hh"];
strDate = [dateFormatter stringFromDate:myDate];
NSLog(@"%@", strDate);

（首先你的原始格式化程序是错误的，你有一个：而不是一个。）编辑不再是这种情况

其次，您要忽略 CEST 位，因为这会导致您的时区被更改

Answer 3

改成

[dateFormatter setDateFormat:@"EEE, dd MMM yyyy hh.mm a vvvv"];

（。而不是：在 hh:mm 中）