UIWebView loadHTMLString显示空白屏幕
UIWebView loadHTMLString显示空白屏幕
提问于 2011-01-06 13:10:00
我对UIWebView的loadHTMLString有一个奇怪的问题，当我用内容超文本标记语言字符串调用loadHTMLString时，它只会显示一个空白视图。htmlstring的内容是什么并不重要，它只是什么也不做。
奇怪的是，几周前，当我在模拟器和设备上测试它时，它还可以工作。我的代码如下：
NSMutableString *sHtmlBuf = [NSMutableString stringWithString:@"<body style=\"background-color: #000000; color: #FFFFFF; font-family: Helvetica; font-size: 10pt; width: 300px; word-wrap: break-word;\">"];
if ([m_oCallArray count] > 0 || [m_oPutArray count] > 0) {
[sHtmlBuf appendString:sWarrTitle];
if ([m_oCallArray count] > 0) {
NSString *formattedCall = [NSString stringWithFormat:@"%@ %@<br />",sCallTitle,[self arrayToString:m_oCallArray]];
[sHtmlBuf appendFormat:@"%@ ",formattedCall];
}
if ([m_oPutArray count] > 0) {
NSString *formattedPut = [NSString stringWithFormat:@"%@ %@<br />",sPutsTitle,[self arrayToString:m_oPutArray]];
[sHtmlBuf appendFormat:@"%@ ",formattedPut];
}
}
if ([m_oBullArray count] > 0 || [m_oBearArray count] > 0) {
[sHtmlBuf appendString:sCbbcTitle];
if ([m_oBullArray count] > 0) {
NSString *formattedBull = [NSString stringWithFormat:@"%@ %@<br />",sBullTitle,[self arrayToString:m_oBullArray]];
[sHtmlBuf appendFormat:@"%@ ",formattedBull];
}
if ([m_oBearArray count] > 0) {
NSString *formattedBear = [NSString stringWithFormat:@"%@ %@<br />",sBearTitle,[self arrayToString:m_oBearArray]];
[sHtmlBuf appendFormat:@"%@ ",formattedBear];
}
}
if ([m_oOtherArray count] > 0) {
NSString *formattedOther = [NSString stringWithFormat:@"%@ %@<br />",sOtherTitle,[self arrayToString:m_oOtherArray]];
[sHtmlBuf appendFormat:@"%@ ",formattedOther];
}
[m_oDataPresentView loadHTMLString:sHtmlBuf baseURL:nil];(注意:在出现此问题之前，HTML可以在常规web浏览器上呈现，因此HTML不是问题)
编辑:新增初始化代码：
//Create wcbbc panel
wcbbcPanel = [[WarrantsAndCbbc alloc] initWithFrame:CGRectMake(320, 0, 320, 230)];
[m_oMainContentScrollView addSubview:wcbbcPanel];UIView初始化代码：
- (id)initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
if (self) {
// Initialization code.
CGRect oFrame = frame;
CGPoint oPositionCoords = CGPointMake(0, 0);
oFrame.origin = oPositionCoords;
m_oDataPresentView = [[UIWebView alloc] initWithFrame:oFrame];
[m_oDataPresentView loadHTMLString:@"<html><body style=\"background-color: #000000; color: #FFFFFF; font-family: Helvetica; font-size: 10pt; width: 300px; word-wrap: break-word;\"></body></html>" baseURL:nil];
m_oDataPresentView.delegate = self;
[self addSubview:m_oDataPresentView];
}
return self;
}回答 3
Stack Overflow用户
回答已采纳
发布于 2011-01-06 22:24:16
经过一些检测工作后，我发现在委托函数中返回NO
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType将拒绝loadHTMLString请求。返回YES解决了我的问题。
Stack Overflow用户
发布于 2011-05-11 13:44:54
我刚刚遇到了同样的问题，作为一名n00b，我发现自己很惊讶，当我不这样做的时候，问题就解决了
webview = [[UIWebView alloc]init];但是，因为它已经连上了插座，所以我只能打电话给
[webView loadHTMLString:mystring baseURL:nil];Stack Overflow用户
发布于 2011-01-06 15:33:11
从UIWebView的初始化代码可以看出，您正在将wcbbcPanel添加到屏幕之外的位置。试着这样做：
wcbbcPanel = [[WarrantsAndCbbc alloc] initWithFrame:CGRectMake(0, 0, 320, 230)];页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/4611940
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