Question

我正在尝试开发一个应用程序，它将加载一个类似于弹出视图的iAd，它将显示带有图像的webview。我的意思是它将加载JPG或PNG网址。我成功创建了弹出窗口，但webview中没有显示图像，任何人都可以调试我的代码。我会在这里发布。

MainViewController.m

-(IBAction)openPopupWithURL
{
    [MTPopupWindow showWindowWithHTMLFile:@"http://URL/ad.php" insideView:self.view];
}

PopUpWindow.h

#import <Foundation/Foundation.h>
@interface MTPopupWindow : NSObject
{
    UIView* bgView;
    UIView* bigPanelView;
}
+(void)showWindowWithHTMLFile:(NSString*)fileName insideView:(UIView*)view;
@end

PopUpWindow.m

#import "MTPopupWindow.h"
#define kShadeViewTag 1000
@interface MTPopupWindow(Private)
- (id)initWithSuperview:(UIView*)sview andFile:(NSString*)fName;
@end
@implementation MTPopupWindow
/**
 * This is the only public method, it opens a popup window and loads the given content
 * @param NSString* fileName provide a file name to load a file from the app resources, or a URL to load a web page
 * @param UIView* view provide a UIViewController's view here (or other view)
 */
+(void)showWindowWithHTMLFile:(NSString*)fileName insideView:(UIView*)view
{
    [[MTPopupWindow alloc] initWithSuperview:view andFile:fileName];
}

/**
 * Initializes the class instance, gets a view where the window will pop up in
 * and a file name/ URL
 */
- (id)initWithSuperview:(UIView*)sview andFile:(NSString*)fName
{
    self = [super init];
    if (self) {
        // Initialization code here.
        bgView = [[[UIView alloc] initWithFrame: sview.bounds] autorelease];
        [sview addSubview: bgView];

        // proceed with animation after the bgView was added
        [self performSelector:@selector(doTransitionWithContentFile:) withObject:fName afterDelay:0.1];
    }

    return self;
}

/**
 * Afrer the window background is added to the UI the window can animate in
 * and load the UIWebView
 */
-(void)doTransitionWithContentFile:(NSString*)fName
{
    //faux view
    UIView* fauxView = [[[UIView alloc] initWithFrame: CGRectMake(10, 10, 200, 200)] autorelease];
    [bgView addSubview: fauxView];

    //the new panel
    bigPanelView = [[[UIView alloc] initWithFrame:CGRectMake(0, 0, bgView.frame.size.width, bgView.frame.size.height)] autorelease];
    bigPanelView.center = CGPointMake( bgView.frame.size.width/2, bgView.frame.size.height/2);

    //add the window background
    UIImageView* background = [[[UIImageView alloc] initWithImage:[UIImage imageNamed:@"popupWindowBack.png"]] autorelease];
    background.center = CGPointMake(bigPanelView.frame.size.width/2, bigPanelView.frame.size.height/2);
    [bigPanelView addSubview: background];

    //add the web view
    int webOffset = 10;
    UIWebView* web = [[[UIWebView alloc] initWithFrame:CGRectInset(background.frame, webOffset, webOffset)] autorelease];
    web.backgroundColor = [UIColor clearColor];

    if ([fName hasPrefix:@"http"]) {
        //load a web page
        web.scalesPageToFit = YES;
        [web loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString: fName]]];
    } else {
        //load a local file
        NSError* error = nil;
        NSString* fileContents = [NSString stringWithContentsOfFile:[[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:fName] encoding:NSUTF8StringEncoding error: &error];
        if (error!=NULL) {
            NSLog(@"error loading %@: %@", fName, [error localizedDescription]);
        } else {
            [web loadHTMLString: fileContents baseURL:[NSURL URLWithString:@"file://"]];
        }
    }

    [bigPanelView addSubview: web];

    //add the close button
    int closeBtnOffset = 10;
    UIImage* closeBtnImg = [UIImage imageNamed:@"popupCloseBtn.png"];
    UIButton* closeBtn = [UIButton buttonWithType:UIButtonTypeCustom];
    [closeBtn setImage:closeBtnImg forState:UIControlStateNormal];
    [closeBtn setFrame:CGRectMake( background.frame.origin.x + background.frame.size.width - closeBtnImg.size.width - closeBtnOffset, 
                                   background.frame.origin.y ,
                                   closeBtnImg.size.width + closeBtnOffset, 
                                   closeBtnImg.size.height + closeBtnOffset)];
    [closeBtn addTarget:self action:@selector(closePopupWindow) forControlEvents:UIControlEventTouchUpInside];
    [bigPanelView addSubview: closeBtn];

    //animation options
    UIViewAnimationOptions options = UIViewAnimationOptionTransitionFlipFromRight |
                                        UIViewAnimationOptionAllowUserInteraction    |
                                        UIViewAnimationOptionBeginFromCurrentState;

    //run the animation
    [UIView transitionFromView:fauxView toView:bigPanelView duration:0.5 options:options completion: ^(BOOL finished) {

        //dim the contents behind the popup window
        UIView* shadeView = [[[UIView alloc] initWithFrame:bigPanelView.frame] autorelease];
        shadeView.backgroundColor = [UIColor blackColor];
        shadeView.alpha = 0.3;
        shadeView.tag = kShadeViewTag;
        [bigPanelView addSubview: shadeView];
        [bigPanelView sendSubviewToBack: shadeView];
    }];
}

/**
 * Removes the window background and calls the animation of the window
 */
-(void)closePopupWindow
{
    //remove the shade
    [[bigPanelView viewWithTag: kShadeViewTag] removeFromSuperview];    
    [self performSelector:@selector(closePopupWindowAnimate) withObject:nil afterDelay:0.1];

}

/**
 * Animates the window and when done removes all views from the view hierarchy
 * since they are all only retained by their superview this also deallocates them
 * finally deallocate the class instance
 */
-(void)closePopupWindowAnimate
{

    //faux view
    __block UIView* fauxView = [[UIView alloc] initWithFrame: CGRectMake(10, 10, 200, 200)];
    [bgView addSubview: fauxView];

    //run the animation
    UIViewAnimationOptions options = UIViewAnimationOptionTransitionFlipFromLeft |
    UIViewAnimationOptionAllowUserInteraction    |
    UIViewAnimationOptionBeginFromCurrentState;

    //hold to the bigPanelView, because it'll be removed during the animation
    [bigPanelView retain];

    [UIView transitionFromView:bigPanelView toView:fauxView duration:0.5 options:options completion:^(BOOL finished) {

        //when popup is closed, remove all the views
        for (UIView* child in bigPanelView.subviews) {
            [child removeFromSuperview];
        }
        for (UIView* child in bgView.subviews) {
            [child removeFromSuperview];
        }
        [bigPanelView release];
        [bgView removeFromSuperview];

        [self release];
    }];
}

@end

这是输出 No Images :(

我的ad.php

<?php
include("../includes/opencon.php");
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Mobile Ad</title>
</head>
<body>
<?php
$setting = mysql_fetch_object(mysql_query("select * from my_settings where id=1"));
?>
<img src="http://url.com/media/<?=$setting->image?>" style="width:100%; height:auto;"/>
</body>
</html>

Answer 1

请提供其他信息，加载本地或远程图像时是否会发生这种情况。我认为对于本地图像，您可以调整webview的基本URL。

如果您要加载本地图片，请提供应用包的基本网址：

NSString *path = [[NSBundle mainBundle] bundlePath];
NSURL *baseURL = [NSURL fileURLWithPath:path];
[webView loadHTMLString:htmlString baseURL:baseURL];

所以而不是：

[web loadHTMLString: fileContents baseURL:[NSURL URLWithString:@"file://"]];

使用app bundle url：

NSString *path = [[NSBundle mainBundle] bundlePath];
NSURL *baseURL = [NSURL fileURLWithPath:path];
[web loadHTMLString: fileContents baseURL:baseURL];

要进一步调试，您可以将webview的delegate设置为您的视图并检查webview的内容是什么样的：

web.delegate = self;

现在使用委托实现以下内容：

- (void)webViewDidFinishLoad:(UIWebView *)webView
{
    NSString *html = [webView stringByEvaluatingJavaScriptFromString:@"document.documentElement.outerHTML"];
    NSLog(@"%@",html);
}

或者，转到Safari-＆gt;开发 - ＆gt; iPhone模拟器/ iOS设备 - ＆gt; Webview 并查看safari调试控制台中的源代码。

iAd喜欢ios app中的弹出视图

1 个答案: