iOS UIWebView 无法确定web页面的真实高度

来源：互联网发布：编程证明哥德巴赫猜想编辑：程序博客网时间：2024/05/18 02:37

@interface IndEditorDetailViewController ()<uiwebviewdelegate, njkwebviewprogressdelegate="">

{

UIWebView *_webView;

UIProgressView *_progressView;

NJKWebViewProgress *_progressProxy;

}

@end

@implementation IndEditorDetailViewController

- (void)viewDidLoad {

_progressView = [[UIProgressView alloc] init];

_progressView.frame = CGRectMake(0, 0, 320, 10);

[self.view addSubview:_progressView];

_progressProxy = [[NJKWebViewProgress alloc] init];

_webView.delegate = _progressProxy;

_progressProxy.webViewProxyDelegate = self;

_progressProxy.progressDelegate = self;

}

- (void)webViewDidFinishLoad:(UIWebView *)webView{

// 一般获取网页高度会在这个方法里获取

// 但这里获取的高度未必就是web页面的真实高度，因为web中图片未加载完有可能导致web界面不真实，或长或短

// 你能可能用到下面的js方法去获取，但其实都没用

/**

1、document.documentElement.offsetHeight;

2、document.body.clientHeight;

3、document.documentElement.scrollHeight

4、

CGRect frame = webView.frame;

CGSize fittingSize = [webView sizeThatFits:CGSizeZero];

frame.size = fittingSize;

webView.frame = frame;

5、getBodyHeight() // 网页用js实现好的方法

6、CGFloat height = [[webView stringByEvaluatingJavaScriptFromString:@"document.body.clientHeight"] floatValue];

*/

// 所以必须要找到能完全确定web加载，才能确定web高度

// 在网上找了个工具 NJKWebViewProgress

}

#pragma mark - NJKWebViewProgressDelegate

-(void)webViewProgress:(NJKWebViewProgress *)webViewProgress updateProgress:(float)progress

{

if (progress == 0.0) {

[UIApplication sharedApplication].networkActivityIndicatorVisible = YES;

_progressView.progress = 0;

[UIView animateWithDuration:0.27 animations:^{

_progressView.alpha = 1.0;

}];

}

if (progress == 1.0) {

[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;

[UIView animateWithDuration:0.27 delay:progress - _progressView.progress options:0 animations:^{

_progressView.alpha = 0.0;

// webView彻底加载完

CGFloat height = [[_webView stringByEvaluatingJavaScriptFromString:@"document.body.clientHeight"] floatValue];

CGRect frame = _webView.frame;

frame.size.height = height;

_webView.frame = frame;

} completion:nil];

}

[_progressView setProgress:progress animated:NO];

}

@end

</uiwebviewdelegate,>

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