我的 UITextfield 上有一个自动生成的清除按钮,具有默认的蓝色色调。我无法将色调颜色更改为白色。我尝试修改故事板和代码但没有成功,并且我不想使用自定义图像。
如何在不使用自定义图像的情况下更改默认的透明按钮色调颜色?
干得好!
TintTextField。
不使用自定义图像或添加按钮等。
class TintTextField: UITextField {
var tintedClearImage: UIImage?
required init(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
self.setupTintColor()
}
override init(frame: CGRect) {
super.init(frame: frame)
self.setupTintColor()
}
func setupTintColor() {
self.borderStyle = UITextField.BorderStyle.roundedRect
self.layer.cornerRadius = 8.0
self.layer.masksToBounds = true
self.layer.borderColor = self.tintColor.cgColor
self.layer.borderWidth = 1.5
self.backgroundColor = .clear
self.textColor = self.tintColor
}
override func layoutSubviews() {
super.layoutSubviews()
self.tintClearImage()
}
private func tintClearImage() {
for view in subviews {
if view is UIButton {
let button = view as! UIButton
if let image = button.image(for: .highlighted) {
if self.tintedClearImage == nil {
tintedClearImage = self.tintImage(image: image, color: self.tintColor)
}
button.setImage(self.tintedClearImage, for: .normal)
button.setImage(self.tintedClearImage, for: .highlighted)
}
}
}
}
private func tintImage(image: UIImage, color: UIColor) -> UIImage {
let size = image.size
UIGraphicsBeginImageContextWithOptions(size, false, image.scale)
let context = UIGraphicsGetCurrentContext()
image.draw(at: .zero, blendMode: CGBlendMode.normal, alpha: 1.0)
context?.setFillColor(color.cgColor)
context?.setBlendMode(CGBlendMode.sourceIn)
context?.setAlpha(1.0)
let rect = CGRect(x: CGPoint.zero.x, y: CGPoint.zero.y, width: image.size.width, height: image.size.height)
UIGraphicsGetCurrentContext()?.fill(rect)
let tintedImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return tintedImage ?? UIImage()
}
}
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