Iphone 这是UIScrollView中的缩放错误吗？

在符合UIApplicationDelegate和UIScrollViewDelegate的类中，我在中执行了以下操作：

- (void)applicationDidFinishLaunching:(UIApplication *)application {


// Created an instance of UIScrollView to house a horizontal strip - along the x-axis - of kNumberOfPages UIViews:

    scrollView = [[UIScrollView alloc] initWithFrame:[UIScreen mainScreen].applicationFrame];


// Make self the delegate

    scrollView.delegate = self;


// Set content size to the cumulative width of all UIViews contained

    scrollView.contentSize = CGSizeMake(scrollView.frame.size.width * kNumberOfPages, scrollView.frame.size.height);


// Zoom range is from a min of the width of the scrollView to a max of 2 * scrollView.contentSize

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


// A subclass of UIView will be the container for the horizontal strip of UIViews

    containerView = [[ConstrainedView alloc] initWithFrame:CGRectMake(0, 0, scrollView.contentSize.width, scrollView.contentSize.height)];


// The only difference betrween ConstrainedView and UIView is this overloaded method that constrains zooming to only the x-axis


- (void)setTransform:(CGAffineTransform)newValue {


    // Scale along the y-axis only
    CGAffineTransform constrainedTransform = CGAffineTransformScale(CGAffineTransformIdentity, newValue.a, 1.0);


     [super setTransform:constrainedTransform];


}


// Fill the container view with UIViews as subviews
CGFloat horizontalOffsetX = 0.0;
for (int i = 1; i <= kNumberOfPages; i++) {

    CGRect frame = CGRectMake(horizontalOffsetX, 0.0, scrollView.frame.size.width, scrollView.frame.size.height);
    UIView *v = [[[UIView alloc] initWithFrame:frame] autorelease];


// paint the background of each UIView a random color.

    v.backgroundColor = [UIColor colorWithRed:randomRed green:randomGreen blue:randomBlue alpha:1.0];
    [containerView addSubview:v];

    horizontalOffsetX += v.bounds.size.width;

} // for (kNumberOfPages)



// insert the container view as a subview of scrollView
    [scrollView addSubview:containerView];

    [window addSubview:scrollView];
    [window makeKeyAndVisible];

}

-（void）applicationdFinishLaunching:（UIApplication*）应用程序{
//创建了一个UIScrollView实例，以沿x轴放置KNumberOfUI视图的水平条带：
scrollView=[[UIScrollView alloc]initWithFrame:[UIScreen mainScreen].applicationFrame]；
//让自己成为代表
scrollView.delegate=self；
//将内容大小设置为包含的所有UIView的累积宽度
scrollView.contentSize=CGSizeMake（scrollView.frame.size.width*kNumberOfPages，scrollView.frame.size.height）；
//缩放范围从scrollView的最小宽度到最大2*scrollView.contentSize
scrollView.minimumZoomScale=scrollView.frame.size.width/scrollView.contentSize.width；
scrollView.maximumZoomScale=2*scrollView.contentSize；
//UIView的子类将是UIView水平条的容器
containerView=[[ConstrainedView alloc]initWithFrame:CGRectMake（0,0，scrollView.contentSize.width，scrollView.contentSize.height）]；
//ConstrainedView和UIView之间的唯一区别是此重载方法仅限制缩放到x轴
-（void）setTransform:（CGAffineTransform）newValue{
//仅沿y轴缩放
CGAffineTransform constrainedTransform=CGAffineTransformScale（CGAffineTransformIdentity，newValue.a，1.0）；
[超级集合变换：约束变换]；
}
//使用UIView作为子视图填充容器视图
CGFloat horizontalOffsetX=0.0；
对于（inti=1；i更新

我的方法似乎确实适用于以下警告。这里似乎有一个边界条件问题

这项工作：

scrollView.minimumZoomScale=（scrollView.frame.size.width/scrollView.contentSize.width）/0.99

这会挂起-崩溃-应用程序：

scrollView.minimumZoomScale=scrollView.frame.size.width/scrollView.contentSize.width

只要scrollView的宽度超过了内容的宽度，不管是否进行了不同的缩放，该应用程序似乎工作正常

我可以很容易地克服这个小限制。酷

干杯

道格更新

我的方法似乎确实适用于以下警告。这里似乎有一个边界条件问题

这项工作：

scrollView.minimumZoomScale=（scrollView.frame.size.width/scrollView.contentSize.width）/0.99

这会挂起-崩溃-应用程序：

scrollView.minimumZoomScale=scrollView.frame.size.width/scrollView.contentSize.width

只要scrollView的宽度超过了内容的宽度，不管是否进行了不同的缩放，该应用程序似乎工作正常

我可以很容易地克服这个小限制。酷

干杯

Doug
我注意到这一行
scrollView.MaximumZoomSale=2*scrollView.contentSize；
似乎不正确？我认为应该是
scrollView.MaximumZoomSale=2；
我注意到这一行
scrollView.MaximumZoomSale=2*scrollView.contentSize；
似乎不正确？我认为应该是
scrollView.MaximumZoomSale=2；