UIWebView总结

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设置UIWebView透明

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1. [webview setBackgroundColor:[UIColor clearColor]];  
2. 
   
3. webview.opaque = NO;  

禁止UIWebView滚动 

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1. webView.scrollView.bounces = NO; //__IPHONE_5_0  

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

获取UIWebView高度

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1. - (void)webViewDidFinishLoad:(UIWebView *)webView1  
2. {  
3.     UIScrollView *scrollView = (UIScrollView *)[[webView subviews] objectAtIndex:0];  
4.     CGFloat webViewHeight = [scrollView contentSize].height;  
5.     NSString *curHeight = [webView stringByEvaluatingJavaScriptFromString:@"document.body.scrollHeight;"];  
6. 
   
7.     CGRect newFrame = webView.frame;  
8.     newFrame.size.height = webViewHeight;  
9.     webView.frame = newFrame;   
10. }  

使用JS给UIWebView添加事件响应

1.首先定义事件的JavaScript

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1. // timeStamp 微秒  
2. static NSString * const webTouchJavaScriptString =  
3.     @"<script language=\"javascript\">document.ontouchstart=function(event){\  
4.     x=event.targetTouches[0].clientX;\  
5.     y=event.targetTouches[0].clientY;\  
6.     time=event.timeStamp;\  
7.     document.location=\"wiweb:touch:start:\"+x+\":\"+y+\":\"+time;};\  
8.     document.ontouchmove=function(event){\  
9.     x=event.targetTouches[0].clientX;\  
10.     y=event.targetTouches[0].clientY;\  
11.     document.location=\"wiweb:touch:move:\"+x+\":\"+y;};\  
12.     document.ontouchcancel=function(event){\  
13.     document.location=\"wiweb:touch:cancel\";};\  
14.     document.ontouchend=function(event){\  
15.     time=event.timeStamp;\  
16.     document.location=\"wiweb:touch:end:\"+time;}; </script>";  

2.组织字符串

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1. NSString *webviewText = @"<style>body{margin:0;background-color:transparent;color:#000000;word-wrap:break-word;word-break:break-all;font:18px/22px system}</style>";  
2. 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"];  
3. 
   
4. NSString *newHTMLString=[htmlString stringByAppendingString:webTouchJavaScriptString];  

3.事件响应

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1. - (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType  
2. {  
3.     BOOL result = YES;  
4.     NSURL *requestURL =[[request URL] retain];  
5.     NSString *requestString = [[request URL] absoluteString];  
6.     static BOOL bstart = NO;  
7.     static BOOL bmove = NO;  
8.     static double lasttime = 0;  
9. 
   
10.     NSString *str = [requestURL scheme];  
11.     if ( ([str isEqualToString:@"http"] || [str isEqualToString:@"https"] || [str isEqualToString:@"mailto"] || [str isEqualToString:@"tel"])  
12.         && (navigationType == UIWebViewNavigationTypeLinkClicked) )  
13.     {  
14.         result = ![[UIApplication sharedApplication] openURL:[requestURL autorelease]];  
15.     }  
16.     else  
17.     {  
18.         [requestURL release];  
19.         NSArray *components = [requestString componentsSeparatedByString:@":"];  
20.         if ([components count] > 2   
21.             && [(NSString *)[components objectAtIndex:0] isEqualToString:@"wiweb"]  
22.             && [(NSString *)[components objectAtIndex:1] isEqualToString:@"touch"])  
23.         {  
24.             NSString *eventString=[components objectAtIndex:2];  
25.             if ([eventString isEqualToString:@"start"])  
26.             {  
27.                 float pointX=[[components objectAtIndex:3] floatValue];  
28.                 float pointY=[[components objectAtIndex:4] floatValue];  
29.                 double time=[[components objectAtIndex:5] doubleValue];  
30.                 CGPoint aPoint = CGPointMake(pointX, pointY);  
31.                 NSLog(@"start: %@", NSStringFromCGPoint(aPoint));  
32.                 NSLog(@"start time: %0f   interval: %0f", time/1000, (time - lasttime)/1000);  
33.                 lasttime = time;  
34.                 bstart = YES;  
35.                 bmove = NO;  
36.                 NSLog(@"bstart: %d -- bmove: %d", bstart, bmove);  
37.             }  
38.             else if ([eventString isEqualToString:@"move"])  
39.             {  
40.                 float pointX=[[components objectAtIndex:3] floatValue];  
41.                 float pointY=[[components objectAtIndex:4] floatValue];  
42.                 CGPoint aPoint=CGPointMake(pointX, pointY);  
43.                 NSLog(@"move: %@", NSStringFromCGPoint(aPoint));  
44.                 bmove = YES;  
45.                 NSLog(@"bstart: %d -- bmove: %d", bstart, bmove);  
46.             }  
47.             else if ([eventString isEqualToString:@"cancel"])  
48.             {  
49.                 NSLog(@"cancel");  
50.                 bstart = NO;  
51.                 bmove = NO;  
52.                 NSLog(@"bstart: %d -- bmove: %d", bstart, bmove);  
53.             }  
54.             else if ([eventString isEqualToString:@"end"])  
55.             {  
56.                 double time=[[components objectAtIndex:3] doubleValue];  
57.                 NSLog(@"end");  
58.                 NSLog(@"bstart: %d -- bmove: %d", bstart, bmove);  
59.                 NSLog(@"end time: %0f   interval: %0f", time/1000, (time - lasttime)/1000);  
60.                 if (bstart && !bmove)  
61.                 {  
62.                     if (time - lasttime > 400)  
63.                     {  
64.                         NSLog(@"LongPress!!!!!!");  
65.                     }  
66.                     else  
67.                     {  
68.                         NSLog(@"Click!!!!!!");  
69.                     }  
70.                 }  
71.                 bstart = NO;  
72.                 bmove = NO;  
73.             }  
74. 
    
75.             return NO;  
76.         }  
77.     }  
78. 
    
79.     NSURL *url = [request URL];  
80.     NSString *curUrl= [url absoluteString];  
81.     NSLog(@"cururl: %@", curUrl);  
82. 
    
83.     return result;  
84. }