在Xcode中将图像添加到UITextField？

Question

我需要dropdown在Xcode中实现这个概念.

为此,我正在使用UIPickerview.

当点击文本字段(在textFieldDidBeginEditing :)上时,会加载此pickerView.

题:

有没有办法,我可以添加图像TextField？

图像就像一个箭头标记,用户可以通过它来理解点击时dropdown出现的内容.textfield我该如何制作？

Answer 1

UITextField有一个rightView属性,如果你有这样的图像 - 然后您可以轻松地将ImageView对象设置为rightView:

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

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

Answer 2

在Swift中:

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

Answer 3

你可以放在你UIImageView的左边UITextField.

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

Answer 4

Swift 3.0

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

Answer 5

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.

这里TextField的高度为44检查附加图像以供参考.

Swift版本:

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