我的搜索栏中的用户界面行为与预期不同。
我希望它看起来像这样:
在iOS 13中看起来像这样:
在iOS 12中看起来像这样:
我正在使用以下方法在ViewDidLoad中配置搜索栏:
guard let searchField = searchBar.value(forKey: "searchField") as? UITextField else { return }
searchBar.backgroundColor = .red
searchField.backgroundColor = UIColor.black.withAlphaComponent(0.3)
searchField.textColor = .white
searchField.leftView?.tintColor = .white
searchField.attributedPlaceholder = NSAttributedString(string: "Search", attributes: [NSAttributedString.Key.foregroundColor: UIColor.white])
我曾尝试创建您的searchBar,但未对其进行测试。您可以从代码段中找到问题的答案。您还需要向项目添加UISearchBar扩展名,以使用代码段中的某些方法。
searchBar.tintColor = UIColor.white
searchBar.searchBarStyle = .default
searchBar.placeholder = "Search"
searchBar.setTextFieldPlaceholderColor(color: UIColor.white)
searchBar.backgroundColor = UIColor.red
searchBar.setImage(UIImage(named:"searchIcon"), for: .search, state: .normal)
if #available(iOS 13.0, *) {
searchBar.searchTextField.backgroundColor = UIColor.black.withAlphaComponent(0.3)
searchBar.setBackgroundImage(UIImage(), for: .any, barMetrics: .default)
searchBar.searchTextField.textColor = UIColor.dolapGreyColor()
searchBar.searchTextField.font = UIFont.systemFont(ofSize: 12)
} else {
searchBar.removeBackgroundImageView()
searchBar.setTextFieldBackground(color: UIColor.black.withAlphaComponent(0.3))
}
UISearchBar扩展名
extension UISearchBar {
//use for iOS 12 and below
func removeBackgroundImageView(){
if let view:UIView = self.subviews.first {
for curr in view.subviews {
guard let searchBarBackgroundClass = NSClassFromString("UISearchBarBackground") else {
return
}
if curr.isKind(of:searchBarBackgroundClass){
if let imageView = curr as? UIImageView{
imageView.removeFromSuperview()
break
}
}
}
}
}
func setTextFieldBackground(color : UIColor) {
for subView in self.subviews {
for subView1 in subView.subviews {
if subView1.isKind(of: UITextField.self) {
subView1.backgroundColor = color
(subView1 as? UITextField)?.font = UIFont.systemFont(ofSize: 12)
}
}
}
}
func setTextFieldPlaceholderColor(color : UIColor) {
for subView in self.subviews {
for subView1 in subView.subviews {
if subView1.isKind(of: UITextField.self) {
if let placeholder = (subView1 as! UITextField).placeholder {
(subView1 as! UITextField).attributedPlaceholder = NSAttributedString(string:placeholder,attributes: [NSAttributedString.Key.foregroundColor: color])
}
}
}
}
}
}