How do I convert from NSString to NSDate?

Question

how to convert from NSString to NSDate ?

it must be in yyyy-MM-dd HH:mm:ss this format when it converts from NSString to NSDate format

Answer 1

Use NSDateFormatter's dateFromString:

NSString *dateStr = @"20100212";

// Convert string to date object
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:@"yyyyMMdd"];
NSDate *date = [dateFormat dateFromString:dateStr];  

// Convert date object to desired output format
[dateFormat setDateFormat:@"YYYY-MM-dd HH:mm:ss"];
dateStr = [dateFormat stringFromDate:date];  
[dateFormat release];

Answer 2

For further ref. Check out:

http://developer.apple.com/mac/library/documentation/Cocoa/Conceptual/DataFormatting/Articles/dfDateFormatting10_4.html#//apple_ref/doc/uid/TP40002369-SW1