为什么此字符串到日期的转换返回null？

Question

I am tring to create a NSDate variable from string object but it is keep giving me nil object, can anyone tell me why,

dateFormater=[[NSDateFormatter alloc] init];
[dateFormater setDateFormat:@"ccc, dd MMM YYYY h:m:s zzz"];
NSDate *date=[dateFormater dateFromString:@"Wed, 29 May 2013 15:52:38 GMT"];

NSLog(@"date =%@",date);

output: null.

Answer 1

try this code :

    NSString *dateStr = @"Wed, 29 May 2013 15:52:38 GMT";


NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:@"EEE, dd MMMM yyyy HH:mm:ss zzz"];
NSDate *date1 = [dateFormat dateFromString:dateStr];
NSLog(@"%@",date1);

OR check this link

I Hope this code useful for you.

Answer 2

Use

 [dateFormater setDateFormat:@"EEE',' dd MMM YYYY HH:mm:ss zzz"];

istead of

[dateFormater setDateFormat:@"ccc, dd MMM YYYY h:m:s zzz"];

Answer 3

Your DateFormat should be @"EEE, dd MMM yyyy HH:mm:ss zzz"

NSDateFormatter *dateFormater=[[NSDateFormatter alloc] init];
dateFormater setDateFormat:@"EEE, dd MMM yyyy HH:mm:ss zzz"];
NSDate *date=[dateFormater dateFromString:@"Wed, 29 May 2013 15:52:38 GMT"];

NSLog(@"date =%@",date);