我想将清除按钮颜色更改为白色。我尝试了很多方法但没有运气。:( 我还参考了以下内容link。但这对我不起作用。
请找到我尝试过的以下代码。我正在开发最新的 ios 11。感谢任何帮助。
class SearchBar: UISearchBar {
override init(frame: CGRect) {
super.init(frame: frame)
sharedInit()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
sharedInit()
}
override func awakeFromNib() {
super.awakeFromNib()
sharedInit()
}
private func sharedInit() {
self.placeholder = "Search"
self.setTextColor(color: .white)
self.setTextFieldColor(color: UIColor.hexString("549C64"))
self.setPlaceholderTextColor(color: .white)
self.setSearchImageColor(color: .white)
self.setTextFieldClearButtonColor(color: .white)
if let textfield = self.value(forKey: "searchField") as? UITextField {
if let backgroundview = textfield.subviews.first {
backgroundview.layer.cornerRadius = 18.0;
backgroundview.clipsToBounds = true;
}
//textfield.frame = CGRect(x: self.frame.origin.x, y: self.frame.origin.y, width: self.frame.size.width, height: 10.0)
}
//NO LUCK FOR HEIGHT
for subView in self.subviews {
for subsubView in subView.subviews {
if let textField = subsubView as? UITextField {
for subsubView in textField.subviews {
if let btn = subsubView as? UIButton {
print(btn)
}
}
}else if let btn = subsubView as? UIButton {
print(btn)
}
}
if let btn = subView as? UIButton {
print(btn)
}
}
}
}
extension UISearchBar {
private func getViewElement<T>(type: T.Type) -> T? {
let svs = subviews.flatMap { $0.subviews }
guard let element = (svs.filter { $0 is T }).first as? T else { return nil }
return element
}
func getSearchBarTextField() -> UITextField? {
return getViewElement(type: UITextField.self)
}
func getSearchBarButton() -> UIButton? {
return getViewElement(type: UIButton.self)
}
func setTextColor(color: UIColor) {
if let textField = getSearchBarTextField() {
textField.textColor = color
}
}
func setTextFieldColor(color: UIColor) {
if let textField = getViewElement(type: UITextField.self) {
switch searchBarStyle {
case .minimal:
textField.layer.backgroundColor = color.cgColor
textField.layer.cornerRadius = 18.0
if let backgroundview = textField.subviews.first {
backgroundview.layer.cornerRadius = 18.0;
backgroundview.clipsToBounds = true;
}
case .prominent, .default:
textField.backgroundColor = color
}
}
}
func setPlaceholderTextColor(color: UIColor) {
if let textField = getSearchBarTextField() {
textField.attributedPlaceholder = NSAttributedString(string: self.placeholder != nil ? self.placeholder! : "", attributes: [NSAttributedStringKey.foregroundColor: color])
}
}
func setTextFieldClearButtonColor(color: UIColor) {
if let textField = getSearchBarTextField() {
let button = textField.value(forKey: "_clearButton") as! UIButton
if let image = button.imageView?.image {
button.setImage(image.transform(withNewColor: color), for: .normal)
}else{
//button.setImage(#imageLiteral(resourceName: "icon-hotel"), for: .normal)
}
}
if let btn = getSearchBarButton() {
let button = btn.value(forKey: "_clearButton") as! UIButton
if let image = button.imageView?.image {
button.setImage(image.transform(withNewColor: color), for: .normal)
}else{
//button.setImage(#imageLiteral(resourceName: "icon-hotel"), for: .normal)
}
}
}
func setSearchImageColor(color: UIColor) {
if let imageView = getSearchBarTextField()?.leftView as? UIImageView {
imageView.image = imageView.image?.transform(withNewColor: color)
}
}
}
extension UIImage {
func transform(withNewColor color: UIColor) -> UIImage {
UIGraphicsBeginImageContextWithOptions(size, false, scale)
let context = UIGraphicsGetCurrentContext()!
context.translateBy(x: 0, y: size.height)
context.scaleBy(x: 1.0, y: -1.0)
context.setBlendMode(.normal)
let rect = CGRect(x: 0, y: 0, width: size.width, height: size.height)
context.clip(to: rect, mask: cgImage!)
color.setFill()
context.fill(rect)
let newImage = UIGraphicsGetImageFromCurrentImageContext()!
UIGraphicsEndImageContext()
return newImage
}
}
您可以在 iOS 11 中使用自定义图标：
Code:
searchBar.setImage(UIImage(named: "ic_clear"), for: .clear, state: .normal)