swift - 以编程方式设置 UITextField 占位符颜色

Question

如何在 swift 中以编程方式设置 UITextField 占位符颜色？

Answer 1

1 - 用你想要的颜色创建一个 AttributedString。
2 - 将此 AttributedString 设置为文本字段的 attributedPlaceholder 属性

let placeholder = NSAttributedString(string: "Some", attributes: [NSForegroundColorAttributeName : UIColor.redColor()])
let textField = UITextField(frame: CGRect(x: 0, y: 0, width: 100, height: 30));
textField.attributedPlaceholder = placeholder;
self.view.addSubview(textField)

来自苹果文档

var attributedPlaceholder: NSAttributedString!
This property is nil by default. If set, the placeholder string is drawn using a 70% grey color and the remaining style information (except the text color) of the attributed string. Assigning a new value to this property also replaces the value of the placeholder property with the same string data, albeit without any formatting information. Assigning a new value to this property does not affect any other style-related properties of the text field.