ios - NSDateFormatter 的 NSDate 输出不同

我在使用 NSDate 时遇到了一些问题，实际上我只需要它来验证它是否是有效日期，因为如果它是无效日期，则 date 实例将返回零。但是

NSString *textValue = @"13/12/2014";

NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat"MM/dd/yyyy"];

// this should cause the output to have no time
[formatter setTimeStyle:NSDateFormatterNoStyle]; 
formatter.locale = [[NSLocale alloc] initWithLocaleIdentifier"en_US"];
[formatter setCalendar:[[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar]];
[formatter setTimeZone:[NSTimeZone timeZoneWithName"GMT"]];

NSDate *date = [formatter dateFromString:textValue];

date的结果是2015-01-12 00:00:00 +0000

我期望的结果应该是:nil

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Best Answer-推荐答案

NSString *textValue = @"1/12/2014"; 
NSString *textValue1 = @"15/12/2014"; 
NSDateFormatter *formatter = [[NSDateFormatter alloc] init]; 
[formatter setDateFormat"MM/dd/yyyy"]; 
NSDate *date = [formatter dateFromString:textValue]; 
NSLog(@" >> %@ ",date);
NSDate *date1 = [formatter dateFromString:textValue1]; 
NSLog(@" >> %@ ",date);

关于ios - NSDateFormatter 的 NSDate 输出不同，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/24134322/