iPhone SDK-NSDateFormatter-字符串中的NSDate始终返回nil

Question

So this sounds like it should be so simple, yet for me, this code block returns a nil date:

NSDateFormatter *df = [[NSDateFormatter alloc] init];
[df setDateFormat:@"yyyy-MM-dd hh:mm:ss"];
NSDate *newStartDate = [df dateFromString:@"2012-05-11 20:45:00"];

Does anyone have any idea what could be causing newStartDate to be returned as nil ? df is valid, the format string appears to be valid. I'm completely stuck here, so any advice would be great!

Thanks!

Answer 1

change hh to HH . hh is for 1-12 with AM/PM HH is for 0-23.

Answer 2

you should use a valid date

its better if you take something like

NSDate *d = [NSDate date];

or it should be 2012-05-11 20:45:00 +0000

your current static date is missing timezone