Question

如何在UITextField左侧添加放大镜图标？

我找到了类似问题here的答案，但我无法将其转换为swift。

答案：

所以，这里是带有unicode字符的代码：
UILabel *magnifyingGlass = [[UILabel alloc] init];
[magnifyingGlass setText:[[NSString alloc] initWithUTF8String:"\xF0\x9F\x94\x8D"]];
[magnifyingGlass sizeToFit];

[textField setLeftView:magnifyingGlass];
[textField setLeftViewMode:UITextFieldViewModeAlways];
编辑：对于适合iOS 7风格的简单外观，添加Unicode变体选择器\ U000025B6。

我的代码：

let searchIconView = UILabel()
// Doesn't work: searchIconView.text = NSString.init(UTF8String: "\xF0\x9F\x94\x8D")
searchIconView.sizeToFit()
searchTextField.leftView = searchIconView
searchTextField.leftViewMode = .Always

Answer 1

您是否有特定原因尝试将图标添加为UTF8String？如果你有一个放大镜图标作为PNG图像，你可以使用＆＃34; leftView＆＃34;像这样的UITextField的属性;

let imageView = UIImageView()
let magnifyingGlassImage = UIImage(named: "magnifyingGlass")
imageView.image = magnifyingGlassImage
//arrange the frame according to your textfield height and image aspect
imageView.frame = CGRect(x: 0, y: 5, width: 45, height: 20)
imageView.contentMode = .ScaleAspectFit
txtField.leftViewMode = .Always
txtField.leftView = imageView

Answer 2

在Swift中，您可以直接指定表情符号字符

searchIconView.text = ""

Answer 3

两种简单的方法：

您可以使用XCode直接在代码中添加Unicode符号（Edit-＆gt; Emoji＆amp; Symbols）。
你可以使用类似的东西

searchIconView.text = NSString（unicodeScalarLiteral：“\ u {D83D}”）as String

（你必须在这里使用你的角色）

Answer 4

针对 Swift 5 进行更新并使用系统放大镜：

    let imageView = UIImageView()
    let magnifyingGlassImage = UIImage(systemName: "magnifyingglass", withConfiguration: UIImage.SymbolConfiguration(weight: .regular))?.withTintColor(.systemYellow, renderingMode: .alwaysOriginal)
    imageView.image = magnifyingGlassImage
    //arrange the frame according to your textfield height and image aspect
    imageView.frame = CGRect(x: 0, y: 5, width: 45, height: 20)
    imageView.contentMode = .scaleAspectFit
    txtField.leftViewMode = .always
    textField.leftView = imageView

将C转换为Swift：将放大镜图标添加到UITextField

4 个答案: