错误日期格式化程序？

Question

我有：

//date 
    Wed Sep 10 19:21:08 +0000 2014 

NSString *date=[twt objectForKey:@"created_at"]; 
NSDateFormatter *df = [ [NSDateFormatter alloc] init] ; 
[df setDateFormat:@"EEE MMM d HH:mm:ss Z yyyy"]; 
NSDate *newdate = [df dateFromString:date]; 


NSLog(@"%@",date); //good Wed Sep 10 21:13:46 +0000 2014 
    NSLog(@"%@",newdate);// NULL 

的NSDate返回NULL，当如图所示的日期字符串。

Answer 1

解决了：

  NSString *date= [twt objectForKey:@"created_at"] ; 
     NSDateFormatter *frm = [[NSDateFormatter alloc] init]; 
     [frm setLocale:[[NSLocale alloc] initWithLocaleIdentifier:@"en_US_POSIX"] ]; 
      [frm setDateFormat:@"EEE MMM dd HH:mm:ss Z yyyy"]; 
      NSDate *newdate = [frm dateFromString:date ];