iOS开发_UIWebView加载本地html

项目中遇到这样的问题：webview放在uiscrollview，webview加载本地html，之后需要计算webview高度。

步骤如下：

1.首先创建webview.几点注意，高度一定要小于你要加载的html的高度，最好设定个最小值，比如1；并且设置scalesPageToFit = YES使之自适应高度;

self.bottomWebView = [[UIWebView alloc]initWithFrame:CGRectMake(0, CGRectGetMaxY(self.middleView3.frame) + kSectionInterval, kScreenWidth, 100)];
    self.bottomWebView.layer.borderColor = self.topView.layer.borderColor;
    self.bottomWebView.layer.borderWidth = self.topView.layer.borderWidth;
    self.bottomWebView.scalesPageToFit = YES;

 2.其次在控制器中显示。设置代理，加载h5

self.recordScrollView.bottomWebView.delegate = self;
    [self loadH5WithId:self.check.checkId];
    [self.view addSubview:self.recordScrollView];

3.加载h5

NSString *path = [[NSBundle mainBundle] pathForResource:[NSString stringWithFormat:@"cj%d.htm", (int)checkId + 1] ofType:nil];
    NSString *htmlString = [NSString stringWithContentsOfFile:path encoding:NSUTF8StringEncoding error:nil];
    NSURL *baseUrl = [NSURL fileURLWithPath:path];
    [self.recordScrollView.bottomWebView loadHTMLString:htmlString baseURL:baseUrl];

 4.代理方法中计算高度

- (void)webViewDidFinishLoad:(UIWebView *)webView{
    
    float webViewHeight = [[webView stringByEvaluatingJavaScriptFromString: @"document.body.scrollHeight"] floatValue];
    webView.frame = CGRectMake(CGRectGetMinX(webView.frame),CGRectGetMinY(webView.frame),CGRectGetWidth(webView.frame),webViewHeight);
    webView.scrollView.scrollEnabled = NO;
    
    float heightSum = CGRectGetMinY(webView.frame) + webViewHeight + 15;//15增量
    self.recordScrollView.contentSize = CGSizeMake(kScreenWidth, heightSum);
    
}

 这样就可以自适应高度了。