WKWebview 获取网页高度，图片点击查看，网页链接点击
#import
签协议 WKNavigationDelegate
@property (nonatomic,strong)WKWebView *newsWebView;
- (void)createView{
self.newsWebView = [[WKWebViewalloc] init];
self.newsWebView.frame =CGRectMake(0,0, WIDTH,HEIGHT);
self.newsWebView.navigationDelegate = self;
self.newsWebView.scrollView.scrollEnabled = NO;
/// 添加监听网页高度，，将网页作为tableview的头视图
[self.newsWebViewaddObserver:selfforKeyPath:@"scrollView.contentSize"options:NSKeyValueObservingOptionNew|NSKeyValueObservingOptionOldcontext:@"DJWebKitContext"];
///
}
#pragma mark 网页开始加载
- (void)webView:(WKWebView *)webView didStartProvisionalNavigation:(WKNavigation *)navigation{
}
#pragma mark 网页加载完成
- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation{
/// 给网页中的图片添加点击方法
[selfaddImgClickJS];
}
/// 给网页中的图片添加点击方法
- (void)addImgClickJS {
//添加图片点击的回调
[self.newsWebViewevaluateJavaScript:@"function registerImageClickAction(){\
var imgs = document.getElementsByTagName('img');\
for(var i=0;i
imgs[i].customIndex = i;\
imgs[i].οnclick=function(){\
window.location.href=''+this.src;\
}\
}\
}" completionHandler:nil];
[self.newsWebViewevaluateJavaScript:@"registerImageClickAction();"completionHandler:nil];
/ 所有图片点击滑动查看添加以下代码 单图片查看不需要添加
[self.newsWebView evaluateJavaScript:@“function getImages(){
var imgs = document.getElementsByTagName('img');
var imgScr = '';
for(var i=0;i
imgScr = imgs[i].src;
} else {
imgScr = imgScr +'***'+ imgs[i].src;
}
};
return imgScr;
};
[self.newsWebView evaluateJavaScript:@"getImages()" completionHandler:^(id _Nullable result, NSError * _Nullable error) {
if (!error) {
self.imagesArr = result?[NSMutableArray arrayWithArray:[result componentsSeparatedByString:@"***"]]:
nil;
}
}];
}
#pragma mark 监听网页的内容高度
-(void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context{
if (!self.newsWebView.isLoading) {
if([keyPathisEqualToString:@"scrollView.contentSize"]){
self.newsWebView.frame = CGRectMake(0,0, WIDTH,self.newsWebView.scrollView.contentSize.height);
self.newsTableView.tableHeaderView = self.newsWebView;
}
}
}
#pragma mark 页面加载失败时调用
- (void)webView:(WKWebView *)webView didFailProvisionalNavigation:(WKNavigation *)navigation {
}
#pragma mark 在发送请求之前，决定是否跳转
- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler{
NSString *path = [navigationAction.request.URL.absoluteStringstringByRemovingPercentEncoding];
// NSLog(@"-=-=-==-=%@",path);
/// 主页面加载
if ([pathisEqualToString:@"about:blank"]) {
decisionHandler(WKNavigationActionPolicyAllow);
}else{
/// 图片的点击处理
if ([pathhasSuffix:@".png"]||[pathhasSuffix:@".jpg"]||[pathhasSuffix:@".jpeg"]) {
查看图片内容（pod "MWPhotoBrowser", :git =>'https://github.com/EvoIos/MWPhotoBrowser.git', :commit =>'de697e101195557ddca85661ebb266fd3f10776c'
）
单个图片查看
MWPhoto *photo = [[MWPhotoalloc] initWithURL:[NSURLURLWithString:path]];
_photosBrowser = [[MWPhotoBrowseralloc] initWithPhotos:@[photo]];
/// 所有图片滑动查看 用下面一段替换上面两行
NSMutableArray *photoarr = [NSMutableArray array];
for (NSString *url in self.imagesArr) {
MWPhoto *photo = [[MWPhoto alloc] initWithURL:[NSURL URLWithString:url]];
[photoarr addObject:photo];
}
_photosBrowser = [[MWPhotoBrowser alloc] initWithPhotos:photoarr];
if ([self.imagesArr containsObject:path]) {
NSInteger k = [self.imagesArr indexOfObject:path];
[_photosBrowser setCurrentPhotoIndex:k];
}else{
[_photosBrowser setCurrentPhotoIndex:0];
}
UINavigationController *nan = [[UINavigationControlleralloc] initWithRootViewController:_photosBrowser];
_photosBrowser.navigationItem.leftBarButtonItem = [[UIBarButtonItemalloc] initWithImage:[UIImageimageNamed:@"navBack"]style:UIBarButtonItemStylePlaintarget:selfaction:@selector(PhotobackAction)];
nan.modalTransitionStyle =UIModalTransitionStyleCrossDissolve;
[selfpresentViewController:nananimated:YEScompletion:^{
}];
/// 其他网页连接的处理
}elseif ([FLGPanduanToolisWebURL:path]){
if ([pathhasPrefix:@"http://cznews.cz001.com.cn/html/wap/detail.php?pid="]) {
FLGNewsDetailViewController *detail = [[FLGNewsDetailViewControlleralloc] init];
detail.newsID = [pathsubstringFromIndex:51];
[self.navigationControllerpushViewController:detailanimated:YES];
}else{
pod 'TOWebViewController','~> 2.2.6'
TOWebViewController *webVC = [[TOWebViewControlleralloc] initWithURLString:path];
UINavigationController *nan = [[UINavigationControlleralloc] initWithRootViewController:webVC];
nan.navigationBar.translucent =NO;
nan.navigationBar.barTintColor =baseColor;
nan.navigationBar.barStyle =UIStatusBarStyleLightContent;
[nan.navigationBarsetTitleTextAttributes:@{NSFontAttributeName:[UIFontfontWithName:@"Helvetica-Bold"size:19],NSForegroundColorAttributeName:[UIColorwhiteColor]}];
nan.modalTransitionStyle =UIModalTransitionStyleCrossDissolve;
[selfpresentViewController:nananimated:YEScompletion:^{
}];
}
}
decisionHandler(WKNavigationActionPolicyCancel);
}
}