- (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
}
<script type="text/javascript">function change() {
document.getElementById("img").src = "../../Styles/icons/help2.png"
}
</script>
<img id="img" onclick="change()" src="../../Styles/icons/help.png"/>
//img 本身有一个点击事件 不需要服务器控件，用js就能实现了！
最近在做一个项目，点击一个按钮，弹出一张图片，长按图片保存图片，点击图片图片隐藏。
在做的时候发现，当我们长按图片的时候也会执行点击图片的事件，这时候我们就需要判断长按事件和点击事件了。
html
js
