swift我想把搜索栏的背景颜色改为白色加黑色边框

Question

这里是我想要输出的屏幕截图，请检查

我想要像这个搜索栏一样的结果，背景颜色为白色和黑色边框我的代码是

override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(true)

for subView in searchBar.subviews  {
if !subView.subviews.contains(where: { $0 as? UITextField != nil }) { continue }
guard let textField = subView.subviews.first(where: { $0 as? UITextField != nil }) as? UITextField else { return }

let placeholder = NSMutableAttributedString(
string: "Search",
attributes: [.font: UIFont(name: "Helvetica", size: 15.0)!,
.foregroundColor: UIColor.gray
])
textField.attributedPlaceholder = placeholder
textField.layer.cornerRadius = textField.frame.size.height / 2
textField.layer.masksToBounds = true
textField.textColor = .black
textField.backgroundColor = .white

}

这是我的输出屏幕截图，请检查

我无法设置搜索栏，请建议我

Answer 1

您好！如果我正确理解你，那么这可能会解决你的问题。UISearchBar(Swift 5(的扩展：

import UIKit
extension UISearchBar {
func setupSearchBar(background: UIColor = .white, inputText: UIColor = .black, placeholderText: UIColor = .gray, image: UIColor = .black) {
self.searchBarStyle = .minimal
self.barStyle = .default
// IOS 12 and lower:
for view in self.subviews {
for subview in view.subviews {
if subview is UITextField {
if let textField: UITextField = subview as? UITextField {
// Background Color
textField.backgroundColor = background
//   Text Color
textField.textColor = inputText
//  Placeholder Color
textField.attributedPlaceholder = NSAttributedString(string: textField.placeholder ?? "", attributes: [NSAttributedString.Key.foregroundColor : placeholderText])
//  Default Image Color
if let leftView = textField.leftView as? UIImageView {
leftView.image = leftView.image?.withRenderingMode(.alwaysTemplate)
leftView.tintColor = image
}
let backgroundView = textField.subviews.first
backgroundView?.backgroundColor = background
backgroundView?.layer.cornerRadius = 10.5
backgroundView?.layer.masksToBounds = true
}
}
}
}
// IOS 13 only:
if let textField = self.value(forKey: "searchField") as? UITextField {
// Background Color
textField.backgroundColor = background
//   Text Color
textField.textColor = inputText
//  Placeholder Color
textField.attributedPlaceholder = NSAttributedString(string: textField.placeholder ?? "", attributes: [NSAttributedString.Key.foregroundColor : placeholderText])
//  Default Image Color
if let leftView = textField.leftView as? UIImageView {
leftView.image = leftView.image?.withRenderingMode(.alwaysTemplate)
leftView.tintColor = image
}
}
}
}

此外，您可以尝试使用图像来完成此操作。只使用Apple API的方法是创建一个图像并使用setSearchFieldBackgroundImage:

self.searchBar.setSearchFieldBackgroundImage(UIImage(named: "SearchFieldBackground"), for: UIControlState.normal)

来源：无法更改搜索栏背景色