iOS UITextField使用

- (UITextField *)phoneTextField

{

    if (!_phoneTextField) {

        _phoneTextField = [[UITextField
alloc]init];

        [_phoneTextField
setBorderStyle:UITextBorderStyleNone];

        [_phoneTextField
setPlaceholder:@"请输入手机号"];

        [_phoneTextField
setTextColor:RGB(51,
51, 51)];

        [_phoneTextField
setFont:[UIFont
systemFontOfSize:15]];

        [_phoneTextField
setKeyboardType:UIKeyboardTypePhonePad];

        [_phoneTextField
setClearButtonMode:UITextFieldViewModeWhileEditing];

        [_phoneTextField
addTarget:self
action:@selector(textFieldDidChange:)
forControlEvents:UIControlEventEditingChanged];

        

 }

    return
_phoneTextField;

}

[self.view
addSubview:self.phoneTextField];

 _phoneTextField.frame =
CGRectMake(50,
50, kScreenWidth,
45);