Question

我有两个观点; UIView位于UITableView之上。我需要知道UIView何时被淘汰，所以我在其上放置了UIPanGestureRecognizer。但是，这会创建一个看似错误的UI，因为您希望它背后的UITableView像您的手指一样移动。

因此，似乎我需要以某种方式配对此平移手势，使其背后的桌面视图移动，至少，直到此覆盖视图消失。

如何配对平移手势以移动UIScrollView？

注意：如果您想知道封面视图，它实际上是一个UIImageView，它有一个表视图的快照，并且出于UI原因应用了一个过滤器。当该视图被淘汰时，它会消失。因此，从用户的角度来看，当他们开始拖动封面视图时，我希望他们一直认为当封面消失时他们正在拖动表格视图。

Answer 1

假设您有一个视图控制器，其表格设置如下：

class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource, UIGestureRecognizerDelegate 
{

    @IBOutlet var tableView: UITableView!
    @IBOutlet var scrollView: UIScrollView!

您可以添加几个手势识别器：

    var gestureRecognizer1: UIPanGestureRecognizer = UIPanGestureRecognizer()
    var gestureRecognizer2: UIPanGestureRecognizer = UIPanGestureRecognizer()

设置您的代理人并将手势识别器添加到滚动视图中：

    override func viewDidLoad()
    {
        super.viewDidLoad()

        scrollView.contentSize = CGSizeMake( ) // <-- Set your content size.
        scrollView.delegate = self
        tableView.delegate = self
        gestureRecognizer1.delegate = self
        gestureRecognizer2.delegate = self
        tableView.addGestureRecognizer(gestureRecognizer1)
        scrollView.addGestureRecognizer(gestureRecognizer2)
    }

为UIGestureRecognizerDelegate实施委托方法以识别同时手势：

    func gestureRecognizer(gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWithGestureRecognizer otherGestureRecognizer: UIGestureRecognizer) -> Bool
    {
        return true
    }

为UIScrollViewDelegate：

实施委托方法

    func scrollViewDidScroll(scrollView: UIScrollView) 
    {
        tableView.contentOffset = scrollView.contentOffset
    }
}

tableView的移动将同步到滚动视图。

Answer 2

最后，我决定用[MonoDroid] UNHANDLED EXCEPTION: [MonoDroid] System.Xml.XmlException: Text node cannot appear in this state. Line 1, position 1. [MonoDroid] at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () <0x00028> [MonoDroid] at System.Runtime.CompilerServices.AsyncMethodBuilderCore.<ThrowAsync>m__0 (object) <0x0003f> [MonoDroid] at Android.App.SyncContext/<Post>c__AnonStorey0.<>m__0 () <0x00027> [MonoDroid] at Java.Lang.Thread/RunnableImplementor.Run () <0x0003f> [MonoDroid] at Java.Lang.IRunnableInvoker.n_Run (intptr,intptr) <0x0003b> [MonoDroid] at (wrapper dynamic-method) object.c4ebb548-a354-4444-bc7d-3e13bebb1053 (intptr,intptr) <0x0003b> [art] JNI RegisterNativeMethods: attempt to register 0 native methods for md52ce486a14f4bcd95899665e9d932190b.JavaProxyThrowable [AndroidRuntime] Shutting down VM [AndroidRuntime] FATAL EXCEPTION: main [AndroidRuntime] Process: MyApplication, PID: 32611 [AndroidRuntime] java.lang.RuntimeException: java.lang.reflect.InvocationTargetException [AndroidRuntime] at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1195) [AndroidRuntime] Caused by: java.lang.reflect.InvocationTargetException [AndroidRuntime] at java.lang.reflect.Method.invoke(Native Method) [AndroidRuntime] at java.lang.reflect.Method.invoke(Method.java:372) [AndroidRuntime] at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1400) [AndroidRuntime] ... 1 more [AndroidRuntime] Caused by: md52ce486a14f4bcd95899665e9d932190b.JavaProxyThrowable: System.Xml.XmlException: Text node cannot appear in this state. Line 1, position 1. [AndroidRuntime] at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () <0x00028> [AndroidRuntime] at System.Runtime.CompilerServices.AsyncMethodBuilderCore.<ThrowAsync>m__0 (object) <0x0003f> [AndroidRuntime] at Android.App.SyncContext/<Post>c__AnonStorey0.<>m__0 () <0x00027> [AndroidRuntime] at Java.Lang.Thread/RunnableImplementor.Run () <0x0003f> [AndroidRuntime] at Java.Lang.IRunnableInvoker.n_Run (intptr,intptr) <0x0003b> [AndroidRuntime] at (wrapper dynamic-method) object.c4ebb548-a354-4444-bc7d-3e13bebb1053 (intptr,intptr) <0x0003b> [AndroidRuntime] [AndroidRuntime] at mono.java.lang.RunnableImplementor.n_run(Native Method) [AndroidRuntime] at mono.java.lang.RunnableImplementor.run(RunnableImplementor.java:29) [AndroidRuntime] at android.os.Handler.handleCallback(Handler.java:739) [AndroidRuntime] at android.os.Handler.dispatchMessage(Handler.java:95) [AndroidRuntime] at android.os.Looper.loop(Looper.java:145) [AndroidRuntime] at android.app.ActivityThread.main(ActivityThread.java:5942) [AndroidRuntime] ... 4 more [Process] Sending signal. PID: 32611 SIG: 9直接更改单元格的图像，而不是拍摄快照。无论如何，这种方式应该是我应该做的，它更清洁，并且不会使用任何可能有问题的“变通方法”。

将我自己的UIPanGestureRecognizer与UIScrollView的配对

2 个答案: