NSDateFormatter.dateFromString返回（空）

Question

我第一次使用NSDateFormatter，当我尝试从字符串获取日期，然后它给nil。

NSDateFormatter * formatter = [[NSDateFormatter alloc] init]; 
[formatter setDateStyle:NSDateFormatterMediumStyle];  
[formatter setDateFormat:@"MMM dd , YYYY"];  
[formatter setTimeZone:[NSTimeZone defaultTimeZone]];  
NSDate * date = [formatter dateFromString:@"2013-10-10 09:51:24 +0000"]; 
NSLog(@"%@",date); 

请告诉我在这里错过了什么，在此先感谢。 。 。

Answer 1

请尝试以下代码

NSDateFormatter * formatter = [[NSDateFormatter alloc] init]; 

[formatter setDateStyle:NSDateFormatterMediumStyle]; 

[formatter setDateFormat:@"yyyy-MM-dd HH:mm:ss z"]; 

[formatter setTimeZone:[NSTimeZone defaultTimeZone]]; 

NSDate * date = [formatter dateFromString:@"2013-10-10 09:51:24 +0000"]; 

[formatter setDateFormat:@"MMM dd , YYYY"]; 

NSString *dateString = [formatter stringFromDate:date]; 

NSDate *outDate = [formatter dateFromString:dateString]; 

NSLog(@"%@,%@,%@",date,dateString,outDate); 

Answer 2

试试这个方法...它可以帮助你

NSDateFormatter * formatter = [[NSDateFormatter alloc] init]; 

    [formatter setDateStyle:NSDateFormatterMediumStyle]; 

    [formatter setDateFormat:@"yyyy-MM-dd hh:mm:ss z"]; 

    [formatter setTimeZone:[NSTimeZone defaultTimeZone]]; 
NSDate * date = [formatter dateFromString:@"2013-10-10 09:51:24 +0000"]; 

    NSLog(@"%@",date); // prints 2013-10-10 09:51:24 +0000 

[formatter setDateFormat:@"MMM dd , YYYY"]; 

NSString *String = [formatter stringFromDate:date]; 

NSDate *final = [formatter dateFromString:String]; 

NSLog(@"%@,%@,%@",date,String,final);