涵盖的知识点:
- 获取webView 加载url 链接中的参数
- WKWebView 在Swift 中的使用
- WKWebView 的navigationDelegate方法含义
- 去掉WKWebView 键盘自带的工具栏
1. 获取webView 加载url 链接中的参数
// 通过URL 的query 参数获得所有的参数的一个字符串
let url = URL(string: "http://www.example.com/response?code=1234")
guard let u = url else {
return
}
let query = u.query
guard let q = query else {
return
}
print(q) // code=1234
// 以字符串截取的形式 来获取想要的参数
let code = String(q["code=".endIndex...])
print(code) // 1234
2. WKWebView 在Swift 中的使用
Swift 5.0之后 使用WKWebView 需要引入头文件
import WebKit, 且UIWebView 在4月份就被彻底废弃了.
3. WKWebView 的navigationDelegate方法含义
// 页面开始加载时调用
func webView(_ webView: WKWebView, didStartProvisionalNavigation navigation: WKNavigation!) {
}
// 当内容开始返回时调用
func webView(_ webView: WKWebView, didCommit navigation: WKNavigation!) {
}
// 页面加载完成之后调用
func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
}
// 页面加载失败时调用
func webView(_ webView: WKWebView, didFailProvisionalNavigation navigation: WKNavigation!, withError error: Error) {
}
// 接收到服务器跳转请求之后调用
func webView(_ webView: WKWebView, didReceiveServerRedirectForProvisionalNavigation navigation: WKNavigation!) {
}
// 在收到响应后，决定是否跳转 -> 默认允许
func webView(_ webView: WKWebView, decidePolicyFor navigationResponse: WKNavigationResponse, decisionHandler: @escaping (WKNavigationResponsePolicy) -> Void) {
//允许跳转
decisionHandler(.allow)
//不允许跳转
// decisionHandler(.cancel)
}
// 在发送请求之前，决定是否跳转 -> 默认允许
func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, preferences: WKWebpagePreferences, decisionHandler: @escaping (WKNavigationActionPolicy, WKWebpagePreferences) -> Void) {
decisionHandler(.allow, preferences)
}
4. 去掉WKWebView 键盘自带的工具栏
需要去掉工具栏的WKWebView 直接调用hack_removeInputAccessory即可.
// MARK: 去掉WKWebView自带的 工具栏
fileprivate final class InputAccessoryHackHelper: NSObject {
@objc var inputAccessoryView: AnyObject? { return nil }
}
extension WKWebView {
func hack_removeInputAccessory() {
guard let target = scrollView.subviews.first(where: {
String(describing: type(of: $0)).hasPrefix("WKContent")
}), let superclass = target.superclass else {
return
}
let noInputAccessoryViewClassName = "\(superclass)_NoInputAccessoryView"
var newClass: AnyClass? = NSClassFromString(noInputAccessoryViewClassName)
if newClass == nil, let targetClass = object_getClass(target), let classNameCString = noInputAccessoryViewClassName.cString(using: .ascii) {
newClass = objc_allocateClassPair(targetClass, classNameCString, 0)
if let newClass = newClass {
objc_registerClassPair(newClass)
}
}
guard let noInputAccessoryClass = newClass, let originalMethod = class_getInstanceMethod(InputAccessoryHackHelper.self, #selector(getter: InputAccessoryHackHelper.inputAccessoryView)) else {
return
}
class_addMethod(noInputAccessoryClass.self, #selector(getter: InputAccessoryHackHelper.inputAccessoryView), method_getImplementation(originalMethod), method_getTypeEncoding(originalMethod))
object_setClass(target, noInputAccessoryClass)
}
}
.End
