iOS Why can't convert NSString to NSDate?

mikezang said:

I have a string is @"Tuesday, January 01, 2013", and I use code as below to convert it to date, but I only get nil, does anyone tell me why?

Code:

+ (NSDate *)dateFromString:(NSString *)string withFormat:(NSString *)format {
	NSDateFormatter *inputFormatter = [[NSDateFormatter alloc] init];
	[inputFormatter setDateFormat:format];
	NSDate *date = [inputFormatter dateFromString:string];
	return date;
}

NSString *str = @"Tuesday, January 01, 2013";
NSDate *date = [NSDate dateFromString:str withFormat:@"EEEE, MMMM dd, yyyy"];

Click to expand...

http://stackoverflow.com/questions/1775401/how-to-convert-nsdate-to-nsstring ?

Where is your class method declared? Have you added a category for NSDate?

Edit: my prior edit was incorrect. But have a look here, the author has an example of what you want near the bottom:

http://www.cocoawithlove.com/2009/05/simple-methods-for-date-formatting-and.html?m=1