圖標在textField中的位置

Question

我想要一個帶有這樣的適當快捷方式的文本框：

我的代碼是這樣的：

let imageViewUsername = UIImageView();
    let imageUsername = UIImage(named: "icon_username.png");
    imageViewUsername.image = imageUsername;
    imageViewUsername.frame = CGRect(x: 0, y: 0, width: 20, height: 20)
    imageViewUsername.contentMode = UIViewContentMode.ScaleAspectFit
    txtUsername.leftView = imageViewUsername;
    txtUsername.leftViewMode = UITextFieldViewMode.Always
    txtUsername.addSubview(imageViewUsername)

在文本字段的開頭，我將圖標完全移到了左側。 隨着運動？

Answer 1

我測試了一下，它按預期工作，您可以看到我的代碼：

override func viewDidLoad() {
  super.viewDidLoad()

  // Creating ImageView
  let imageView = UIImageView()
  // Downloading an image
  imageView.image = UIImage(data: NSData(contentsOfURL: NSURL(string: "https://cdn4.iconfinder.com/data/icons/ionicons/512/icon-person-128.png")!)!)
  imageView.contentMode = .ScaleAspectFit
  imageView.frame = CGRectMake(0, 0, 80, 100)

  // Creating TextField
  let textField = UITextField()
  textField.placeholder = "Username"
  textField.frame = CGRectMake(100, 100, 400, 100)

  // Setting up TextField with ImageView
  textField.leftView = imageView
  textField.leftViewMode = .Always

  // Showing the TextField on the ViewController's View
  self.view.addSubview(textField)
}

Answer 2

代替X = 0，您可以根據需要移動X值。 好像10-20會很好。 ，將高度和寬度WRT更改為文本字段。 更新的代碼：

let imageViewUsername = UIImageView();
let imageUsername = UIImage(named: "icon_username.png");
imageViewUsername.image = imageUsername;
imageViewUsername.frame = CGRect(x: 10, y: 0, width: txtUsername.frame.height, height: txtUsername.frame.height) // Updated value.
imageViewUsername.contentMode = UIViewContentMode.ScaleAspectFit
txtUsername.addSubview(imageViewUsername)