UIWebView使用

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原创最新推荐文章于 2026-05-27 02:03:05 发布 843 阅读 AI 写同款· GEO 优化 ›

Swift UIWebView的使用 swift结合webView定制浏览器 webview的介绍 webview的基本使用步骤简单的浏览器效果实现 ·WebView的介绍在IOS9中，涉及到对网页的操作，基本上都可以使用UIWebView的进行实现。你可以使用UIWebView Class将网页内容嵌入到你的APP内。UIWebView不仅支持外链内容的获取，而且可以加载本地HTML代码进行展示，对于IOS8以前(包括IOS8) 阅读详情

设置UIWebView透明

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[webview setBackgroundColor:[UIColor clearColor]];
webview.opaque = NO;

禁止UIWebView滚动

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webView.scrollView.bounces = NO; //__IPHONE_5_0

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UIScrollView *scrollView = (UIScrollView *)[[webView subviews] objectAtIndex:0];
scrollView.bounces = NO;

获取UIWebView高度

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- (void)webViewDidFinishLoad:(UIWebView *)webView1
{
UIScrollView *scrollView = (UIScrollView *)[[webView subviews] objectAtIndex:0];
CGFloat webViewHeight = [scrollView contentSize].height;
NSString *curHeight = [webView stringByEvaluatingJavaScriptFromString:@"document.body.scrollHeight;"];
CGRect newFrame = webView.frame;
newFrame.size.height = webViewHeight;
webView.frame = newFrame;
}

使用JS给UIWebView添加事件响应

1.首先定义事件的JavaScript

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// timeStamp 微秒
static NSString * const webTouchJavaScriptString =
@"<script language=\"javascript\">document.ontouchstart=function(event){\
x=event.targetTouches[0].clientX;\
y=event.targetTouches[0].clientY;\
time=event.timeStamp;\
document.location=\"wiweb:touch:start:\"+x+\":\"+y+\":\"+time;};\
document.ontouchmove=function(event){\
x=event.targetTouches[0].clientX;\
y=event.targetTouches[0].clientY;\
document.location=\"wiweb:touch:move:\"+x+\":\"+y;};\
document.ontouchcancel=function(event){\
document.location=\"wiweb:touch:cancel\";};\
document.ontouchend=function(event){\
time=event.timeStamp;\
document.location=\"wiweb:touch:end:\"+time;}; </script>";

2.组织字符串

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NSString *webviewText = @"<style>body{margin:0;background-color:transparent;color:#000000;word-wrap:break-word;word-break:break-all;font:18px/22px system}</style>";
NSString *htmlString = [webviewText stringByAppendingFormat:@"%@", @"自定ＳＤＦＳＤＦＳＤＦＳＤＦ义字体fsdgjdlagj asdkgjksdh卡号给卡仕达；逛了会街啊啊流口水 http://www.baidu.com 的感觉卡拉；四大金刚；拉开始打工绿卡；但是结果来看；就爱上的看过就卡的；上来讲赶快来；啊都是经过后ihgoiadsg；肯定是噶上的好；拉克丝的价格爱国阿斯顿改了可"];
NSString *newHTMLString=[htmlString stringByAppendingString:webTouchJavaScriptString];

3.事件响应

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- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{
BOOL result = YES;
NSURL *requestURL =[[request URL] retain];
NSString *requestString = [[request URL] absoluteString];
static BOOL bstart = NO;
static BOOL bmove = NO;
static double lasttime = 0;
NSString *str = [requestURL scheme];
if ( ([str isEqualToString:@"http"] || [str isEqualToString:@"https"] || [str isEqualToString:@"mailto"] || [str isEqualToString:@"tel"])
&& (navigationType == UIWebViewNavigationTypeLinkClicked) )
{
result = ![[UIApplication sharedApplication] openURL:[requestURL autorelease]];
}
else
{
[requestURL release];
NSArray *components = [requestString componentsSeparatedByString:@":"];
if ([components count] > 2
&& [(NSString *)[components objectAtIndex:0] isEqualToString:@"wiweb"]
&& [(NSString *)[components objectAtIndex:1] isEqualToString:@"touch"])
{
NSString *eventString=[components objectAtIndex:2];
if ([eventString isEqualToString:@"start"])
{
float pointX=[[components objectAtIndex:3] floatValue];
float pointY=[[components objectAtIndex:4] floatValue];
double time=[[components objectAtIndex:5] doubleValue];
CGPoint aPoint = CGPointMake(pointX, pointY);
NSLog(@"start: %@", NSStringFromCGPoint(aPoint));
NSLog(@"start time: %0f interval: %0f", time/1000, (time - lasttime)/1000);
lasttime = time;
bstart = YES;
bmove = NO;
NSLog(@"bstart: %d -- bmove: %d", bstart, bmove);
}
else if ([eventString isEqualToString:@"move"])
{
float pointX=[[components objectAtIndex:3] floatValue];
float pointY=[[components objectAtIndex:4] floatValue];
CGPoint aPoint=CGPointMake(pointX, pointY);
NSLog(@"move: %@", NSStringFromCGPoint(aPoint));
bmove = YES;
NSLog(@"bstart: %d -- bmove: %d", bstart, bmove);
}
else if ([eventString isEqualToString:@"cancel"])
{
NSLog(@"cancel");
bstart = NO;
bmove = NO;
NSLog(@"bstart: %d -- bmove: %d", bstart, bmove);
}
else if ([eventString isEqualToString:@"end"])
{
double time=[[components objectAtIndex:3] doubleValue];
NSLog(@"end");
NSLog(@"bstart: %d -- bmove: %d", bstart, bmove);
NSLog(@"end time: %0f interval: %0f", time/1000, (time - lasttime)/1000);
if (bstart && !bmove)
{
if (time - lasttime > 400)
{
NSLog(@"LongPress!!!!!!");
}
else
{
NSLog(@"Click!!!!!!");
}
}
bstart = NO;
bmove = NO;
}
return NO;
}
}
NSURL *url = [request URL];
NSString *curUrl= [url absoluteString];
NSLog(@"cururl: %@", curUrl);
return result;
}

一、简单的stringByEvaluatingJavaScriptFromString使用。
NSString *currentURL = [webView stringByEvaluatingJavaScriptFromString:@"document.location.href"];

NSString *title = [webview stringByEvaluatingJavaScriptFromString:@"document.title"];

NSString *js_result = [webView stringByEvaluatingJavaScriptFromString:@"document.getElementsByName('q')[0].value='xxx';"];

NSString *js_result2 = [webView stringByEvaluatingJavaScriptFromString:@"document.forms[0].submit(); "];

上面的功能我们可以封装到一个js函数中，将这个函数插入到页面上执行，代码如下：

[webView stringByEvaluatingJavaScriptFromString:@"var script = document.createElement('script');"
         "script.type = 'text/javascript';"
         "script.text = \"function myFunction() { "
         "var field = document.getElementsByName('q')[0];"
         "field.value='朱祁林';"
         "document.forms[0].submit();"
         "}\";"
         "document.getElementsByTagName('head')[0].appendChild(script);"];

[webView stringByEvaluatingJavaScriptFromString:@"myFunction();"];