NSString和NSDate之间的相互转换

 

NSString to NSDate

NSString *dateString = @"01-02-2010";
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
// this is imporant - we set our input date format to match our input string
// if format doesn't match you'll get nil from your string, so be careful
[dateFormatter setDateFormat:@"dd-MM-yyyy"];
NSDate *dateFromString = [[NSDate alloc] init];
// voila!
dateFromString = [dateFormatter dateFromString:dateString];
[dateFormatter release];

NSDate convert to NSString:

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"dd-MM-yyyy"];
NSString *strDate = [dateFormatter stringFromDate:[NSDate date]];
NSLog(@"%@", strDate);
[dateFormatter release];

包括时间的转换：

 NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
 
 [dateFormatter setDateFormat: @"yyyy-MM-dd HH:mm:ss"]; 
 
 NSDate *birthday0 = [dateFormatter dateFromString:@"1992-05-21 13:04:44"];
 
 [dateFormatter release];