WKWebView的属性cookie同步、alert不弹出等问题
零、WKWebView属性
1、基本属性
代理:WKUIDelegate,WKNavigationDelegate(代理方法见后面)
//进行配置控制器
WKWebViewConfiguration *configuration = [[WKWebViewConfiguration alloc] init];
//实例化对象
configuration.userContentController = [WKUserContentController new];
//JS调用OC方法注册,在dealloc方法中必须移除,否则内存泄露
[configuration.userContentController addScriptMessageHandler:self name:@"appShareIOS"];
//允许视频播放(默认是YES)
configuration.allowsAirPlayForMediaPlayback = YES;
// 允许在线播放(默认是YES)
configuration.allowsInlineMediaPlayback = YES;
// 允许可以与网页交互,选择视图
configuration.selectionGranularity = YES;
// 是否支持记忆读取
configuration.suppressesIncrementalRendering = YES;
// 创建设置属性对象
WKPreferences *preference = [[WKPreferences alloc]init];
// 设置字体大小(最小的字体大小)
preference.minimumFontSize = 40;
// 设置偏好设置对象
configuration.preferences = preference;
_webView = [[HtmlWKWebView alloc] initWithFrame:CGRectMake(0, 64, SCREEN_WIDTH, SCREEN_HEIGHT-64) configuration:configuration];
_webView.UIDelegate = self;
_webView.navigationDelegate = self;
//开启手势触摸
_webView.allowsBackForwardNavigationGestures = YES;
// 设置 可以前进 和 后退
//适应你设定的尺寸
[_webView sizeToFit];
//注意!注意!注意:上面将当前ViewController设置为MessageHandler之后需要在当前ViewController销毁前将其移除,否则会造成内存泄漏。
-(void)dealloc{
[_webView.configuration.userContentController removeScriptMessageHandlerForName:@"appShareIOS"];
}
2、禁止页面一些操作,在网页加载完时写入(didFinishNavigation)
//页面加载完后获取高度
- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation{
(1) 禁用 页面元素选择
[_webView evaluateJavaScript:@"document.documentElement.style.webkitUserSelect='none';" completionHandler:^(id _Nullable obj, NSError * _Nullable error) {
}];
(2) 禁用 长按弹出ActionSheet
[_webView evaluateJavaScript:@"document.documentElement.style.webkitTouchCallout='none';" completionHandler:^(id _Nullable obj, NSError * _Nullable error) {
}];
(3) WKWebView禁止放大缩小(捏合手势)
NSString *injectionJSString = @"var script = document.createElement('meta');"
"script.name = 'viewport';"
"script.content=\"width=device-width, initial-scale=1.0,maximum-scale=1.0, minimum-scale=1.0, user-scalable=no\";"
"document.getElementsByTagName('head')[0].appendChild(script);";
[webView evaluateJavaScript:injectionJSString completionHandler:nil];
(4)清除WK缓存,否则H5界面跟新,这边不会更新
if ([UIDevice currentDevice].systemVersion.floatValue>=9.0) {
// - (void)webView:(WKWebView *)webView didFinishNavigation:(null_unspecified WKNavigation *)navigation 中就成功了 。
// 然而我们等到了iOS9!!!没错!WKWebView的缓存清除API出来了!代码如下:这是删除所有缓存和cookie的
NSSet *websiteDataTypes = [WKWebsiteDataStore allWebsiteDataTypes];
//// Date from
NSDate *dateFrom = [NSDate dateWithTimeIntervalSince1970:0];
//// Execute
[[WKWebsiteDataStore defaultDataStore] removeDataOfTypes:websiteDataTypes modifiedSince:dateFrom completionHandler:^{
}];
}else{
//iOS8清除缓存
NSString * libraryPath = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES).firstObject;
NSString * cookiesFolderPath = [libraryPath stringByAppendingString:@"/Cookies"];
[[NSFileManager defaultManager] removeItemAtPath:cookiesFolderPath error:nil];
}
(5)获取网页高度
[webView evaluateJavaScript:@"document.body.offsetHeight;" completionHandler:^(id Result, NSError * error) {
dispatch_async(dispatch_get_main_queue(), ^{
CGFloat documentHeight = [Result doubleValue]+15.00;
// NSLog(@"高度%f",documentHeight);
// [DWBToast showCenterWithText:[NSString stringWithFormat:@"%f",documentHeight]];
if (self.htmlString.length>0) {
//啥也不干
}else{
documentHeight = 0.0;
}
_footView.frame = CGRectMake(0, documentHeight-self.footView.frame.size.height, SCREEN_WIDTH, self.footView.frame.size.height);
//加载完设置好坐标打开
_footView.hidden = NO;
});
}];
}
一、WKWebView - alert不弹出(这是WKWebView相对于UIWebView的一个坑)
#pragma mark======================WKWebView - alert不弹出(这是WKWebView相对于UIWebView的一个坑)===========================================
//WKWebView默认不响应js的alert()事件,如何可以开启alert权限呢?
//设置wkwebview.delegate = self;
//实现下面三个方法:
- (void)webView:(WKWebView *)webView runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(void))completionHandler{
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"提示" message:message?:@"" preferredStyle:UIAlertControllerStyleAlert];
[alertController addAction:([UIAlertAction actionWithTitle:@"确认" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
completionHandler();
}])];
[[UIApplication sharedApplication].keyWindow.rootViewController presentViewController:alertController animated:YES completion:nil];
}
- (void)webView:(WKWebView *)webView runJavaScriptConfirmPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(BOOL))completionHandler{
// DLOG(@"msg = %@ frmae = %@",message,frame);
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"提示" message:message?:@"" preferredStyle:UIAlertControllerStyleAlert];
[alertController addAction:([UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
completionHandler(NO);
}])];
[alertController addAction:([UIAlertAction actionWithTitle:@"确认" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
completionHandler(YES);
}])];
[[UIApplication sharedApplication].keyWindow.rootViewController presentViewController:alertController animated:YES completion:nil];
}
- (void)webView:(WKWebView *)webView runJavaScriptTextInputPanelWithPrompt:(NSString *)prompt defaultText:(NSString *)defaultText initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(NSString * _Nullable))completionHandler{
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:prompt message:@"" preferredStyle:UIAlertControllerStyleAlert];
[alertController addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
textField.text = defaultText;
}];
[alertController addAction:([UIAlertAction actionWithTitle:@"完成" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
completionHandler(alertController.textFields[0].text?:@"");
}])];
[[UIApplication sharedApplication].keyWindow.rootViewController presentViewController:alertController animated:YES completion:nil];
}
二、WKWebView默认禁止了一些跳转
//UIWebView打开ituns.apple.com跳转到appStore, 拨打电话, 唤起邮箱等一系列操作UIWebView默认支持的.
//WKWebView默认禁止了以上行为,除此之外,js端通过window.open()打开新的网页的动作也被禁掉了.如何支持呢?可以跳转appStore或者拨号
-(void)webView:(WKWebView* )webView decidePolicyForNavigationAction:(WKNavigationAction* )navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler {
if(webView != _webView) {
decisionHandler(WKNavigationActionPolicyAllow);
return;
}
UIApplication *app = [UIApplication sharedApplication];
if ([url.scheme isEqualToString:@"tel"])
{
if ([app canOpenURL:url])
{
[app openURL:url];
decisionHandler(WKNavigationActionPolicyCancel);
return;
}
}
if ([url.absoluteString containsString:@"ituns.apple.com"])
{
if ([app canOpenURL:url])
{
[app openURL:url];
decisionHandler(WKNavigationActionPolicyCancel);
return;
}
}
decisionHandler(WKNavigationActionPolicyAllow);
}
三、WKWebView代理方法
#pragma mark - WKNavigationDelegate
// 页面开始加载时调用
- (void)webView:(WKWebView *)webView didStartProvisionalNavigation:(WKNavigation *)navigation {
}
// 内容开始返回时调用
- (void)webView:(WKWebView *)webView didCommitNavigation:(WKNavigation *)navigation {
}
// 页面加载完成时调用
- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation {
}
// 页面加载失败时调用
- (void)webView:(WKWebView *)webView didFailProvisionalNavigation:(WKNavigation *)navigation {
}
//新增的三个代理方法:
// 这个方法是服务器重定向时调用,即 接收到服务器跳转请求之后调用
- (void)webView:(WKWebView *)webView didReceiveServerRedirectForProvisionalNavigation:(WKNavigation *)navigation {
}
// 在收到响应后,决定是否跳转
- (void)webView:(WKWebView *)webView decidePolicyForNavigationResponse:(WKNavigationResponse *)navigationResponse decisionHandler:(void (^)(WKNavigationResponsePolicy))decisionHandler {
}
// 在发送请求之前,决定是否跳转
- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler {
//需执行decisionHandler的block。
}
四、WKUIDelegate 协议
#pragma mark - WKUIDelegate
//WKWebView打开新界面 需要打开新界面是,WKWebView的代理WKUIDelegate方法
- (WKWebView *)webView:(WKWebView *)webView createWebViewWithConfiguration:(WKWebViewConfiguration *)configuration forNavigationAction:(WKNavigationAction *)navigationAction windowFeatures:(WKWindowFeatures *)windowFeatures {
// 会拦截到window.open()事件.只需要我们在在方法内进行处理
if (!navigationAction.targetFrame.isMainFrame) {
[webView loadRequest:navigationAction.request];
}
return nil;
}
/**
* web界面中有弹出警告框时调用
*
* @param webView 实现该代理的webview
* @param message 警告框中的内容
* @param frame 主窗口
* @param completionHandler 警告框消失调用
*/
- (void)webView:(WKWebView *)webView runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(void (^)())completionHandler {
}
/// 输入框
- (void)webView:(WKWebView *)webView runJavaScriptTextInputPanelWithPrompt:(NSString *)prompt defaultText:(nullable NSString *)defaultText initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(NSString * __nullable result))completionHandler {
}
/// 确认框
- (void)webView:(WKWebView *)webView runJavaScriptConfirmPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(BOOL result))completionHandler {
}
/// 警告框
- (void)webView:(WKWebView *)webView runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(void))completionHandler {
}
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