Objective c 在ScrollView中加载UIWebView时内容发生更改_Objective C_Ios_Uiwebview_Uiscrollview

Objective c 在ScrollView中加载UIWebView时内容发生更改

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Objective c 在ScrollView中加载UIWebView时内容发生更改,objective-c,ios,uiwebview,uiscrollview,Objective C,Ios,Uiwebview,Uiscrollview,当用户阅读所选新闻时，我想制作一些类似Pulse news的东西未加载图像时，尚未指定图像的空间。加载图像后，内容的大小也会改变（文本将被向下推以为图像留出空间）我该怎么做？我现在使用的是滚动视图，其中包含uiwebview - (void)loadView { self.view = [[UIView alloc] initWithFrame:CGRectZero]; UIView *thisView = [[UIView alloc] initWithFrame:CGRectMake(

当用户阅读所选新闻时，我想制作一些类似Pulse news的东西

未加载图像时，尚未指定图像的空间。加载图像后，内容的大小也会改变（文本将被向下推以为图像留出空间）

我该怎么做？我现在使用的是滚动视图，其中包含uiwebview

- (void)loadView
{
self.view = [[UIView alloc] initWithFrame:CGRectZero];
UIView *thisView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height)];
contentTitleLabel = [[UILabel alloc] initWithFrame:CGRectMake(10, 5, 292, 82)];        
contentThumbnailWebView = [[UIWebView alloc] initWithFrame:CGRectMake(10, CGRectGetMaxY(contentTitleLabel.frame), 292, 0)];

contentDateLabel = [[UILabel alloc]initWithFrame:CGRectMake(10, CGRectGetMaxY(contentThumbnailWebView.frame), 292, 23)];

playVideoButton = [[UIButton alloc] initWithFrame:CGRectMake(CGRectGetMaxX(contentThumbnailWebView.frame)/2, CGRectGetMaxY(contentThumbnailWebView.frame)/2, 72, 37)];
[playVideoButton setTitle:@"Play" forState:UIControlStateNormal];
playVideoButton.hidden = YES;    

contentSummaryLabel = [[UILabel alloc] initWithFrame:CGRectMake(10, CGRectGetMaxY(contentDateLabel.frame), 292, 20)];
contentScrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height)];
contentScrollView.backgroundColor = [UIColor whiteColor];

[thisView addSubview:contentScrollView];

[contentScrollView addSubview:contentDateLabel];
    [contentScrollView addSubview:contentTitleLabel];
[contentScrollView addSubview:contentThumbnailWebView];
[contentScrollView addSubview:playVideoButton];
[contentScrollView addSubview:contentSummaryLabel];
//[self.view addSubview:thisView];   
self.view = thisView;
contentThumbnailWebView.delegate = self;
}

我读过几个关于这个的话题，但我仍然无法解决它

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

CGRect frame = aWebView.frame;
frame.size.height = 1;
aWebView.frame = frame;
CGSize fittingSize = [aWebView sizeThatFits:CGSizeZero];
fittingSize.width = aWebView.frame.size.width;
frame.size = fittingSize;
aWebView.frame = frame;

NSLog(@"size: %f, %f", fittingSize.width, fittingSize.height);

[contentDateLabel setFrame:CGRectMake(10, CGRectGetMaxY(aWebView.frame), 292, 23)];
playVideoButton = [[UIButton alloc] initWithFrame:CGRectMake(CGRectGetMaxX(aWebView.frame)/2, CGRectGetMaxY(aWebView.frame)/2, 72, 37)];
[contentSummaryLabel setFrame:CGRectMake(10, CGRectGetMaxY(contentDateLabel.frame), 292, contentSummaryLabel.frame.size.height )];

contentScrollView.contentSize = CGSizeMake(contentScrollView.frame.size.width, CGRectGetMaxX(contentSummaryLabel.frame));

}

我加载了jpg图像链接。图像已加载，但高度未正确调整大小。当webview加载时，我也无法再次滚动scrollView

下面是我调用要加载的图像的时候

- (void) setImageAsThumbnail:(NSString *)imagehumbnailLink
{            
NSURL    *imageURL   = [NSURL URLWithString:imageThumbnailLink];    
NSString *cssString = @"<style type='text/css'>img {width: 292px; height: auto;}</style>";
NSString *myHTMLContent = @"<html><head></head><body><img src='%@'></body></html>";
NSString *htmlString = [NSString stringWithFormat:@"%@%@",cssString,myHTMLContent];
 NSString *imageHTML  = [[NSString alloc] initWithFormat:htmlString, imageURL];    
contentThumbnailWebView.scalesPageToFit = YES;
[contentThumbnailWebView loadHTMLString:imageHTML baseURL:nil];         
}

-（void）setImageAshumbnail:（NSString*）imagehumbnailLink
{            
NSURL*imageURL=[NSURL URLWithString:imageThumbnailLink]；
NSString*cssString=@“img{宽度：292px；高度：auto；}”；
NSString*myHTMLContent=@；
NSString*htmlString=[NSString stringWithFormat:@“%@%@”，CSSSSTRING，myHTMLContent]；
NSString*imageHTML=[[NSString alloc]initWithFormat:htmlString，imageURL]；
contentThumbnailWebView.scalesPageToFit=是；
[contentThumbnailWebView加载HtmlString:ImageHtmlBaseURL:nil]；
}

谢谢大家!

我经常在UIScrollView中使用UIWebView，因为加载HTML是异步完成的，所以在加载完成后，必须调整web视图的大小和滚动视图的内容大小

[webView sizeThatFits:CGSizeZero]

对我来说也不管用。相反，在

webViewDidFinishLoad:（UIWebView*）webView

中，您可以通过执行一段Javascript来测量HTML文档的大小：

NSString *js = @"document.getElementById('container').offsetHeight;";
NSString *heightString = [webView stringByEvaluatingJavaScriptFromString:js];
int height = [heightString intValue]; // HTML document height in pixels

在本例中，必须将ID“container”分配给HTML中的顶级元素（确保其周围没有边距）。这种方法对我很有效