webView基本用法

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    UIWebView *webView = [[[UIWebView alloc] initWithFrame:CGRectMake(0, 0, 320, 460)] autorelease];

    //使用loadHTMLString()方法显示网页内容  使用此方法是如果html非完整需要进行转换！！
    [webView loadHTMLString:[self getHtmlString] baseURL:nil];

    [self.view addSubview:webView];
}
    //读取html文件内容
- (NSString *)getHtmlString{
    //文件路径
    NSString *filePath = [[NSBundle mainBundle] pathForResource:@"index" ofType:@"html"];

    NSString *contents = [NSString stringWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:nil];
    return contents;
}

1. 给他设置一个代理类  UIWebView needs a delegate to reset it's size accoreding to it's content.
2. 代理类中实现如下方法 Implish "- (void)webViewDidFinishLoad:(UIWebView *) webView" in the delegate:

- (void)webViewDidFinishLoad:(UIWebView *) webView
{
    CGSize actualSize = [webView sizeThatFits:CGSizeZero];

    CGRect newFrame = webView.frame;
    newFrame.size.height = actualSize.height;
    webView.frame = newFrame;
}

3. OK.

二.使用javascipt获得可是可视区域宽高

@implementation UIWebView (SFHFStringMetrics)

- (CGSize) sizeOfDocument {

NSString *javascriptString = @"\"{\" + document.documentElement.clientWidth + \", \" + document.documentElement.clientHeight + \"}\"";

NSString *sizeString = [self stringByEvaluatingJavaScriptFromString: javascriptString];

if (!sizeString || [sizeString length] < 1) {

returnCGSizeZero;

}

returnCGSizeFromString(sizeString);

}

5.禁止长按事件

[webView stringByEvaluatingJavaScriptFromString:@"document.documentElement.style.webkitUserSelect='none';"];

[webView stringByEvaluatingJavaScriptFromString:@"document.body.style.webkitTouchCallout='none';"];