Question

我正在尝试设置嵌套的UIScrollViews。我有两个滚动视图具有相同的内容大小640 * 640设置如下：canvasScrollView（a UIScrollView）＆gt; contentScrollView（a UIScrollView）＆gt;内容（UIView）。这些都在UIViewController中。我想要发生的是，当用户在contentScrollView中的内容上缩放时，canvasScrollView视图以相同的因子和速度缩放 out 。我尝试过设置如下代码：

#import "ViewController.h"
#import "ContentView.h"

@interface ViewController () <UIScrollViewDelegate>
@property (weak, nonatomic) IBOutlet UIScrollView *canvasScrollView;



@property (strong, nonatomic) UIView *viewForZoom;
@property (strong, nonatomic) ContentView *content;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];



    UIScrollView *contentScrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 320, 568)];
    contentScrollView.contentSize=CGSizeMake(640 ,640);
    contentScrollView.minimumZoomScale=0.25;
    contentScrollView.maximumZoomScale=1;
    self.content = [[[NSBundle mainBundle] loadNibNamed:@"floatingView" owner:self options:nil] objectAtIndex:0];
    self.viewForZoom=self.content;
    [contentScrollView addSubview:self.content];
    contentScrollView.delegate=self;


    //canvasScrollView was setup in the interface builder, same dimensions as above 320*568
    self.canvasScrollView.contentSize=CGSizeMake(640 ,640);
    self.canvasScrollView.minimumZoomScale=0.25;
    self.canvasScrollView.maximumZoomScale=1;
    self.canvasScrollView.userInteractionEnabled=NO;
    [self.canvasScrollView addSubview:contentScrollView];



}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

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

    return  self.viewForZoom;
}

我的第一步是确保它是缩放的contentScrollView而不是canvasScrollView。使用上面的代码，视图加载正常，但我无法平移或缩放内容。我不确定为什么这不起作用。我已经从用户交互中禁用了canvasScrollView，因为稍后将以编程方式对其进行修改，我还设置了contentScrollView委托。虽然没有工作。真的很感激这一点的帮助!!!

由于

Answer 1

您已将contentScrollView添加到具有userInteractionEnabled=NO的视图中。不允许用户交互的视图不允许用户交互任何子视图。请尝试将其附加到self.view。

[self.view addSubview:contentScrollView];

嵌套的UIScrollViews。尝试使用与其他放大速度和因子相同的速度和因子缩小。查看冻结

1 个答案: