iphone - 我在这个日期格式化程序中做错了什么

Question

 NSDate *date=[[NSDate alloc] init];
    NSDateFormatter *dfLocal=[[NSDateFormatter alloc]init];
    [dfLocal setDateFormat:@"yyyy-MM-dd"];
    date=[dfLocal dateFromString:@"2011-09-22"];
    NSLog(@"the date is %@",date);

这是我的代码，输出为..

2012-04-02 18:13:45.338 TimeProblem[2656:207] the date is 2011-09-21 18:30:00 +0000

为什么要将这个.. 18:30:00 +0000 追加到最后..？我只希望它是 00:00:00 +0000

Answer 1

在下面使用:

NSDate *date=[[NSDate alloc] init];
NSDateFormatter *dfLocal=[[NSDateFormatter alloc]init];
[dfLocal setDateFormat:@"yyyy-MM-dd"];
[dfLocal setTimeZone:[NSTimeZone timeZoneWithAbbreviation:@"GMT"]];
date=[dfLocal dateFromString:@"2011-09-22"];

NSLog(@"the date is %@",date);