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我有 xml 文件，我在 xml 文件中读取了所有信息并存储在数组中，

这是我用于存储在数组中的 starDidElement 文件：

-(void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI 
 qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict{

if ([elementName isEqualToString:@"Presentation"]) {
    NSLog(@"user element found – create a new instance of User class...");
    app.presentationArray = [[NSMutableArray alloc] init];
    thePresentation = [[Presentation alloc] init];
    thePresentation.pLabel = [attributeDict objectForKey:@"label"];
    NSLog(@"PLabel: %@", thePresentation.pLabel);

}else if ([elementName isEqualToString:@"slides"]) {
    NSLog(@"Slides");

    thePresentation.slides = [NSMutableArray array];

在我的标题中，我有

   Presentation thePresentation;

你能帮我解决这个问题吗

提前致谢

编辑： 

Presentation *aPresentation = [app.presentationArray objectAtIndex:0];
NSLog(@"Presentation is: %@ and it's Slide Count is: %d",aPresentation.pLabel, aPresentation.slides.count);

Slide *aSlide = [aPresentation.slides objectAtIndex:0];
NSLog(@"Slide Label is: %@", aSlide.sLabel);

UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
[btn setTitle:[NSString stringWithString:aSlide.sLabel] forState:UIControlStateNormal];
btn.frame = rect;
[btn setTag:i];
[btn addTarget:self action:@selector(buttonClick:)  forControlEvents:UIControlEventTouchUpInside];
[imageView addSubview:btn];

那么日志是

[788:c07] 演示文稿是：(null)，它的幻灯片计数是：0 [788:c07] 幻灯片标签是：(null)

4

2 回答 2

2

当你这样做时会发生什么：

Presentation *aPresentation = [app.presentationArray objectAtIndex:0];
NSLog(@"Presentation is: %@ and it's Slide Count is: %d",aPresentation.pLabel, aPresentation.slides.count);

Slide *aSlide = [aPresentation.slides objectAtIndex:0];
    NSLog(@"Slide Label is: %@", aSlide.sLabel);

    UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
    [btn setTitle:[NSString stringWithString:aSlide.sLabel] forState:UIControlStateNormal];
    btn.frame = rect;
    [btn setTag:i];
    [btn addTarget:self action:@selector(buttonClick:)  forControlEvents:UIControlEventTouchUpInside];
    [imageView addSubview:btn];
于 2012-10-15T17:59:06.747 回答
0

在您的 viewController 中添加一个公共方法，一旦您的 xml 解析完成调用该公共方法，这意味着您告诉您的 viewController 数据已准备好并更新 UI。

您可以使用 appDelegate 通知 viewController 数据已准备好，因为 appDelegate 将拥有您的 viewController 的实例。

编辑：您可以拥有以下内容：

//in viewController.h
- (void) viewFillUp;

//in viewController.m
-(void)viewFillUp
{
      Slide *aSlide = [thePresentation.slides objectAtIndex:0];
      NSLog(@"Slide Label is: %@", aSlide.sLabel);

      UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
      [btn setTitle:[NSString stringWithString:aSlide.sLabel] forState:UIControlStateNormal];
      btn.frame = rect;
      [btn setTag:i];
      [btn addTarget:self action:@selector(buttonClick:)  forControlEvents:UIControlEventTouchUpInside];
      [imageView addSubview:btn];
}

//in appDelegate.h
 - (void) parsingDone;

//in appDelegate.m
- (void) parsingDone
{
    //suppose ur viewController instance is self.viewController
    [self.viewController viewFillUp]
}
于 2012-10-15T15:13:41.683 回答