UITextField

 

关于UItextField的LeftView属性

    leftView属性赋值时 如果给两个textfield 同时设置这个属性  不能是同一个 View 如果是同一个View 这个页面就不能跳转

    UIView *leftSpaceView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, leftViewW, textFieldH)];

    leftSpaceView.backgroundColor = [UIColor whiteColor];

  

    UIView *leftSpaceViewSecond = [[UIView alloc] initWithFrame:CGRectMake(0, 0, leftViewW, textFieldH)];

    leftSpaceView.backgroundColor = [UIColor whiteColor];

    UITextField *phoneNum = [[UITextField alloc] initWithFrame:CGRectMake(spaceBetweenX, 65, KScreenW - spaceBetweenX*2, textFieldH)];

    phoneNum.tag = -15;

    phoneNum.leftView = leftSpaceView;

    phoneNum.leftViewMode = UITextFieldViewModeAlways;

    phoneNum.layer.borderWidth = 1.0;

    phoneNum.layer.borderColor = [UIColor colorWithHexString:@"#dadada" withAlpha:1].CGColor;

    phoneNum.placeholder = @"已注册手机号";

    [self.view addSubview:phoneNum];

    

    

    UITextField *newCode = [[UITextField alloc] initWithFrame:CGRectMake(spaceBetweenX, CGRectGetMaxY(phoneNum.frame) + 25, KScreenW  - spaceBetweenX*2 - phoneNum.bounds.size.width*1/3 - 10, textFieldH)];

    newCode.backgroundColor = [UIColor clearColor];

    newCode.layer.borderColor = [UIColor colorWithHexString:@"#dadada" withAlpha:1].CGColor;

    newCode.layer.borderWidth = 1.0f;

    newCode.leftView = leftSpaceViewSecond;

    newCode.leftViewMode = UITextFieldViewModeAlways;

    newCode.tag = -16;

    newCode.placeholder = @"请输入短信验证码";

    [self.view addSubview:newCode];

 

 

placeholder的字体颜色、大小

NSAttributedString *one = [[NSAttributedString alloc] initWithString:@"    官方自带" attributes:@{NSFontAttributeName:[UIFont systemFontOfSize:30]}];

tureText.attributedPlaceholder = one;

UITextField中文输入法输入时对字符长度的限制  想限制几位就写几

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

    if ([textField isEqual:self.verifyField]) {

        if (range.location>=3)

            return NO;

        }

    }

  

    return YES;

}