将图像添加到Xcode中的UITextField吗？

我需要实现 dropdown在Xcode中。

为此，我正在使用UIPickerview。

当点击文本字段（在textFieldDidBeginEditing :）事件上时，将加载pickerView。

题：

有没有办法添加图像TextField？

图像就像一个箭头标记，通过它用户可以了解点击时dropdown出现。textfield我该如何做呢？

UITextField有一个rightView属性，如果您有这样的图像，则可以轻松地将ImageView对象设置为rightView：

UITextField *myTextField = [[UITextField alloc] init];

myTextField.rightViewMode = UITextFieldViewModeAlways;
myTextField.rightView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"downArrow.png"]];

在Swift中：

textField.leftViewMode = UITextFieldViewMode.Always
textField.leftView = UIImageView(image: UIImage(named: "imageName"))

您可以将放在您UIImageView的左侧UITextField。

UITextField *textField = [[UITextField alloc] initWithFrame:CGRectMake(96, 40, 130, 20)];
[textField setLeftViewMode:UITextFieldViewModeAlways];
textField.leftView= [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"searchIccon.png"]];

斯威夫特3.0

txtField.rightViewMode = .always
txtField.rightView = UIImageView(image: UIImage(named: "selectdrop"))

要在图像和文本字段之间添加适当的边距/填充，请尝试以下代码。扩展@ King-Wizard的答案。

在这里，我的TextField的高度为44。检查所附图像以供参考。

迅捷版：

emailTF.leftViewMode = .Always
let emailImgContainer = UIView(frame: CGRectMake(emailTF.frame.origin.x, emailTF.frame.origin.y, 40.0, 30.0))
let emailImView = UIImageView(frame: CGRectMake(0, 0, 25.0, 25.0))
emailImView.image = UIImage(named: "image1")
emailImView.center = emailImgContainer.center
emailImgContainer.addSubview(emailImView)
emailTF.leftView = emailImgContainer

第1步：将此类添加到您的项目中，然后将其添加到身份检查器中的textFiled的类中，

class MyCustomTextField: UITextField {

    @IBInspectable var inset: CGFloat = 0

    @IBInspectable var leftImage: String = String(){
        didSet{
            leftViewMode = UITextFieldViewMode.Always
            leftView = UIImageView(image: UIImage(named: leftImage))
        }
    }

    override func textRectForBounds(bounds: CGRect) -> CGRect {
        return CGRectInset(bounds, inset, inset)
    }

    override func editingRectForBounds(bounds: CGRect) -> CGRect {
        return textRectForBounds(bounds)
    }

    override func leftViewRectForBounds(bounds: CGRect) -> CGRect {
        return CGRectInset(CGRectMake(0, 2, 40, 40), 10, 10) //Change frame according to your needs
    }
}

步骤2：从界面构建器设置文本插图和左侧图像。

第三步：享受。

嗨，您想要下拉菜单的队友，然后看到此自定义下拉视图..

1. http://code.google.com/p/dropdowndemo/downloads/list
2. http://ameyashetti.wordpress.com/2010/09/26/drop-down-demo/

并为此要求使用此代码

UITextField *txtstate =[[UITextField alloc]init]; [txtstate setFrame:CGRectMake(10, 30,170, 30)]; 
txtstate.delegate=self; 

txtstate.text=@"Fruits"; 

txtstate.borderStyle = UITextBorderStyleLine; 

txtstate.background = [UIImage imageNamed:@"dropdownbtn.png"]; 

[txtstate setAutocorrectionType:UITextAutocorrectionTypeNo]; 
[self.view addSubview:txtstate];

并设置您的文本框边框样式为无。

UITextField具有以下属性：

@property(nonatomic, retain) UIImage *background

例：

UITextField *myTextField = [[UITextField alloc] init];
myTextField.background = [UIImage imageNamed:@"myImage.png"];

      emailTextField.leftViewMode = .alway
    let emailImgContainer = UIView(frame: CGRect(x: 0, y: 0, width: 30, height: 25))
    let emailImg = UIImageView(frame: CGRect(x: 0, y: 0, width: 25, height: 25))
    emailImg.image = UIImage(named: "SomeIMG")
    emailImgContainer.addSubview(emailImg)
    emailTextField.leftView = emailImgContainer

在此处输入图片说明