[英]UItextfield in UIScrollView and move cursor with magnifying glass
[英]Convert C to Swift: Add magnifying glass icon to UITextField
如何在UITextField
的左侧添加放大镜图标?
我在这里找到了一个类似问题的答案,但我无法将其转换为 swift。
答案:
所以,这是带有 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
您是否有尝试将图标添加为 UTF8String 的特定原因? 如果你有一个放大镜图标作为 PNG 图像,你可以像这样使用 UITextField 的“leftView”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
在 Swift 中,您可以直接分配表情符号字符
searchIconView.text = "🔍"
两种简单的方法:
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)
为 Swift 5 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
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