利用TextFieldDelegate代理方法 – textField:shouldChangeCharactersInRange:replacementString: 限制输入字符

时间:2014-08-14 15:52:18   收藏:0   阅读:350

 

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string

{

    

    if (textField == _workIdTxt) {

       

        NSUInteger lengthOfString = string.length;

        for (NSInteger loopIndex = 0; loopIndex < lengthOfString; loopIndex++) {//只允许数字输入

            unichar character = [string characterAtIndex:loopIndex];

            if (character < 48) return NO; // 48 unichar for 0

            if (character > 57) return NO; // 57 unichar for 9

        }

        

        // Check for total length

        NSUInteger proposedNewLength = textField.text.length - range.length + string.length;

        if (proposedNewLength > 10 || proposedNewLength<2) return NO;//限制长度

        return YES;

    }

    return YES;

}

 

利用TextFieldDelegate代理方法 – textField:shouldChangeCharactersInRange:replacementString: 限制输入字符,布布扣,bubuko.com

原文:http://www.cnblogs.com/tianlin106/p/3912328.html

评论(0
© 2014 bubuko.com 版权所有 - 联系我们:wmxa8@hotmail.com
打开技术之扣,分享程序人生!