问答 当前位置：问答 » 技术问答 » iOS 搜 索 使用xib建立的textfield文本框的内容，判断其内容必须是数字。如果不是弹出对话框提示重输入

我在网上找到了，通过委托实现。但是测试不成功。

网上代码如下：

• (BOOT)textField:(UITextField )textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString )string :(id)sender

{

NSCharacterSet *cs; 

if(textField == phone) 

{ 

    NSLog(@"phone 数字"); 

    cs = [[NSCharacterSet characterSetWithCharactersInString:NUMBERS] invertedSet]; 

    NSString *filtered = [[string componentsSeparatedByCharactersInSet:cs] componentsJoinedByString:@""]; 

    BOOL basicTest = [string isEqualToString:filtered]; 

    if(!basicTest) 

    { 

        UIAlertView* alert = [[UIAlertView alloc] initWithTitle:@"提示" 

                                                        message:@"请输入数字" 

                                                       delegate:nil 

                                              cancelButtonTitle:@"确定" 

                                              otherButtonTitles:nil]; 

         

        [alert show]; 

        //[alert release]; 

    return NO; 

    } 

} 

 

//其他的类型不需要检测，直接写入 

return YES;

}

当我测试不成功，然后我改成了：

• (IBAction)textField:(UITextField )textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString )string :(id)sender

{

NSCharacterSet *cs; 

if(textField == phone) 

{ 

    NSLog(@"phone 数字"); 

    cs = [[NSCharacterSet characterSetWithCharactersInString:NUMBERS] invertedSet]; 

    NSString *filtered = [[string componentsSeparatedByCharactersInSet:cs] componentsJoinedByString:@""]; 

    BOOL basicTest = [string isEqualToString:filtered]; 

    if(!basicTest) 

    { 

        UIAlertView* alert = [[UIAlertView alloc] initWithTitle:@"提示" 

                                                        message:@"请输入数字" 

                                                       delegate:nil 

                                              cancelButtonTitle:@"确定" 

                                              otherButtonTitles:nil]; 

         

        [alert show]; 

        //[alert release]; 

    //return NO; 

    } 

} 

 

//其他的类型不需要检测，直接写入 

//return YES;

}

大神帮忙，就一个简单的文本框内容判断。有好的方法求知.求大神分享点判断技术给小弟我咯