输入字符串的验证是否为日期? [英] Validation for input string is Date or not?

问题描述

我有一个文本字段，用户可以在其中输入他们的出生日期，现在我想在保存到数据库之前确定输入是否为日期格式.我通过了 SO ，但仍然没有得到答案.谁能告诉我如何验证(它是日期)输入.

I have a textfield where the user can enter their date of birth, now i wants to make sure whether the input is of date format before saving into database. I gone through the SO , but still i didn't get the answer. Can anyone tell me how to validate(is it date) the input.

日期格式为 MM/DD/YYYY

注意:我不希望用户通过日期选择器选择日期.

推荐答案

试试这个

NSString *dateFromTextfield = @"07/24/2013";

   // Convert string to date object
    NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
    [dateFormat setDateFormat:@"MM/dd/yyyy"];// here set format which you want...
    NSDate *date = [dateFormat dateFromString:dateFromTextfield]; 
    [dateFormat release];

然后检查

//set int position to 2 and 5  as it contain / for a valid date
unichar ch = [dateFromTextfield characterAtIndex:position];
NSLog(@"%c", ch);

if (ch == '/') 
{
 //valid date
}
else
 { 
 //not a valid date
} 

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