UIScrollView不响应setZoomScale:

Question

我究竟做错了什么？这是我创建+填充我的scrollView的方法

    -(void)viewDidAppear:(BOOL)animated {

    UIImageView *imgView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"bigimage.jpg"]];
    imgView.contentMode = UIViewContentModeScaleAspectFit;

    scrollView = [[UIScrollView alloc] initWithFrame:self.view.frame];
    scrollView.contentSize = imgView.frame.size;

    scrollView.minimumZoomScale =  scrollView.frame.size.width / scrollView.contentSize.width * 0.99;
    scrollView.maximumZoomScale =  2;

    [self.view addSubview:scrollView];


[scrollView addSubview:imgView];

    [scrollView setZoomScale:0.5 animated:YES];
    NSLog(@"current zoomScale: %f", scrollView.zoomScale);
    [imgView release];
}

NSLogged zoomScale为1.0,图像以完整大小清晰显示.捏缩放不起任何作用.我已经尝试了几乎所有我能在网上找到的东西,但是每个人似乎都在做这个,并且它适用于他们.

非常感谢帮助!

Answer 1

UIScrollView除非将其delegate属性设置为UIScrollViewDelegate响应的有效值,否则A 不会缩放

- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView;

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