从NSString到NSDate的转换给iPhone提供了错误的值和格式

Question

I want to compare two dates.For that i have to dates in two strings(fromDates and toDates).

here fromDate is showing the correct value in console.

//Console.
19/12/2012 from date is

After the NSDateFormatter process im getting wrong format and date and sometime it is showing NULL.

//console
First = (null)

I used the below method.

if (fromDate) {
        self.printFromDate.text = [NSString stringWithFormat:@"%@",curBtn.dateString];
        fromDates = self.printFromDate.text;
        NSLog(@"%@ from date is",fromDates);
       dtFormatter  = [[NSDateFormatter alloc] init];
        [dtFormatter setDateFormat:@"yyyy-MM-dd"];
        NSDate *strDate = [dtFormatter dateFromString:fromDates];
        NSLog(@"First = %@",strDate);    
    }

Can anyone please tell me where im goin wrong.i completly stuck here.Thanks in advance.

Answer 1

Your date formatter doesn't follow the string format.

I think you're looking for this:

[dtFormatter setDateFormat:@"dd/MM/yyyy"];
NSDate *date1 = [dtFormatter dateFromString:fromDates];
NSDate *date2 = [dtFormatter dateFromString:anotherDate];

if ([date1 compare:date2] == NSOrderedDescending)
    NSLog(@"date1 comes first");        
else if ([date1 compare:date2] == NSOrderedAscending)
    NSLog(@"date2 comes first");
else
    NSLog(@"date1 is the same date as date2");

Answer 2

        dtFormatter  = [[NSDateFormatter alloc] init];
        [dtFormatter setDateFormat:@"dd/MM/yyyy"];
        NSDate *strDate = [[NSDate alloc] init];
        strDate = [dtFormatter dateFromString:fromDates];
        NSLog(@"First = %@",strDate); 

I think it will be helpful to you.