- (void)webViewDidFinishLoad:(UIWebView *)webView {
[IDProgressHUD IDPlaceViewHideDirect:self.view]
//这里是js，主要目的实现对url的获取
static NSString * const jsGetImages =
@"function getImages(){\
var objs = document.getElementsByTagName(\"img\")\
var imgScr = ''\
for(var i=0i<objs.lengthi++){\
imgScr = imgScr + objs[i].src + '+'\
}\
return imgScr\
}"
[webView stringByEvaluatingJavaScriptFromString:jsGetImages]//注入js方法
NSString *urlResurlt = [webView stringByEvaluatingJavaScriptFromString:@"getImages()"]
mUrlArray = [NSMutableArray arrayWithArray:[urlResurlt componentsSeparatedByString:@"+"]]
if (mUrlArray.count >= 2) {
[mUrlArray removeLastObject]
}
//urlResurlt 就是获取到得所有图片的url的拼接；mUrlArray就是所有Url的数组
//添加图片可点击js
[mWebView stringByEvaluatingJavaScriptFromString:@"function registerImageClickAction(){\
var imgs=document.getElementsByTagName('img')\
var length=imgs.length\
for(var i=0i<lengthi++){\
img=imgs[i]\
img.onclick=function(){\
window.location.href='image-preview:'+this.src}\
}\
}"]
[mWebView stringByEvaluatingJavaScriptFromString:@"registerImageClickAction()"]
}
//在这个方法中捕获到图片的点击事件和被点击图片的url
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {
//预览图片
if ([request.URL.scheme isEqualToString:@"image-preview"]) {
NSString* path = [request.URL.absoluteString substringFromIndex:[@"image-preview:" length]]
path = [path stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]
//path 就是被点击图片的url
return NO
}
return YES
}
var imgs = document.getElementsByTagName("img")var imgURLs=new Array(imgs.length)for(var i = 0i<imgs.lengthi++){ imgURLs[i] = imgs[i].src//如果用document.getElementsByTagName("img")[i].src每取一个图片地址就会对全部图片查找一次，这样效率比较低，还是储存在imgs中比较好！}//以上代码最好放在页面的最后面，或window.onload事件里，这样就不会因为页面没有全部加载完而没有全部读取到img元素使用js获取页面中所有的图片地址直接系在innerHtml中只能显示为文本的
应该把img添加到DOM中去才可以显示
参考下面的代码
window.onload = function () {var o = document.getElementById("C_Top")
var img = document.createElement("img")
img.src = "
https://www.baidu.com/img/bdlogo.png
"
var b = document.getElementById("bin2")
b.onclick = function () {
o.appendChild(img)
}
}
这样才能把img元素添加到document中
