Question

我对UIWebView的loadHTMLString有一个奇怪的问题，当我用我的内容HTML字符串调用loadHTMLString时，它只会显示一个空白视图。 htmlstring的内容无关紧要，它什么都不做。

奇怪的是，几周前我曾在模拟器和设备上测试它。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：HTML可以在此问题之前在常规Web浏览器上呈现，因此HTML不是问题）

编辑：添加了初始化代码：

//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;
}

Answer 1

经过一些侦探工作，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。

Answer 2

我遇到了同样的问题，并且作为一个n00b，我发现自己感到惊讶，当我这个问题解决了不要做

webview = [[UIWebView alloc]init];

但相反，由于它已经作为插座连线，我只需要打电话

[webView loadHTMLString:mystring baseURL:nil];

Answer 3

从UIWebView的初始化代码中，您可能会在屏幕外的位置添加wcbbcPanel。试试这个：

wcbbcPanel = [[WarrantsAndCbbc alloc] initWithFrame:CGRectMake(0, 0, 320, 230)];

UIWebView loadHTMLString显示空白屏幕

3 个答案: