gesture

问题 How do we detect a tap & hold on a UITableViewCell ? 回答1: In iOS 3.2 or later you can use UILongPressGestureRecognizer 回答2: Here's the code lifted straight from my app. You should add these methods (and a boolean _cancelTouches member) to a class you derive from UITableViewCell. -(void) tapNHoldFired { self->_cancelTouches = YES; // DO WHATEVER YOU LIKE HERE!!! } -(void) cancelTapNHold { [NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(tapNHoldFired) object:nil]; } -

问题 How do we detect a tap & hold on a UITableViewCell ? 回答1: In iOS 3.2 or later you can use UILongPressGestureRecognizer 回答2: Here's the code lifted straight from my app. You should add these methods (and a boolean _cancelTouches member) to a class you derive from UITableViewCell. -(void) tapNHoldFired { self->_cancelTouches = YES; // DO WHATEVER YOU LIKE HERE!!! } -(void) cancelTapNHold { [NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(tapNHoldFired) object:nil]; } -

问题 I'm adding several UIView objects (e.g. 5) to the screen, one inside the other. This, for example, view5.superview = view4 , view4.superview = view3 , view3.superview=view2 , view2.superview = view1 . For all these UIView I set uitapgesturerecognizer; for view1-4 I just do NSLog(@"tap %@", self) in callback, while for view5 tap I set the following: delete view4 from the hierarchy, then put the same object view4' at the same place of the hierarchy. This object also contains view5' for which

问题 I need to take a view pager in an application which consist of three pages. I am new to android view pager. I have one view named TestSwipingView in second half of the screen and another view for the top half of the screen. How do I configure only TestSwipingView as swipe-able? 回答1: This is how I implemented it. It may give you some idea too. Step 1 : In my main activity, I have made my page adapter and called it in onCreate(). public class SomeActivity extends FragmentActivity { WebView

问题 I currently have a custom UITableViewCell which contains a UIImageView and trying to add a UITapGestureRecognizer on the UIImageView with no luck. here is snippet of the code. //within cellForRowAtIndexPath (where customer table cell with imageview is created and reused) UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleImageTap:)]; tap.cancelsTouchesInView = YES; tap.numberOfTapsRequired = 1; tap.delegate = self; [imageView

问题 Android supports an event onLongPress. The question I have is 'how long' (in milliseconds) is the 'press' to trigger the event? 回答1: The standard long press time is what is returned by getLongPressTimeout(), which is currently 500ms but may change (in 1.0 it was 1000ms but changed in a later release; maybe in the future it will be user-customizable). The browser uses its own long press time because it has some more complicated interactions. I believe this should be 1000, though again it may

问题 i'm developing a simple android application with a RelativeLayout and a WebView inside. I have to detect swipe from bottom to top done only in the 20% of the left part of the screen. So when user swipe in that space from bottom to top i have to show a custom dialog. What i try is: import android.app.Activity; import android.view.MotionEvent; import android.view.View; public class ActivitySwipeDetector implements View.OnTouchListener { static final String logTag = "ActivitySwipeDetector";

问题 i have a listview and implemented onclick and also onfling.problem is when i do fling(swipe left to right), onclick event of listview is also getting executed.How to overCome this problem? how to differentiate touch(tap) and fling(swipe) in listview? listClickListener = new OnItemClickListener() { public void onItemClick(AdapterView<?> parent, View v,int position, long id) { //Job of Onclick Listener } }; mContactList.setOnItemClickListener(listClickListener); mContactList.setAdapter(adapter)

问题 I'd like to make a view in my Android app that flips between multiple views on a swipe/fling. I'd like it to behave more or less like the Android Launcher behaves when flipping between views. In particular, It should flip views on swipe. Generally a swipe will flip between one view and the next. It should not fling across all of the views. If you swipe slowly, you should see the views dragging as you're swiping, eg. the way the Launcher does it. I tried using a ViewFlipper with a

问题 I am trying to add custom behaviour to my buttons. If clicked once - one action is performed. If clicked twice another one is performed. I saw such a solution in this answer and I have tried all possible combinations: clickOnce.shouldBeRequiredToFailByGestureRecognizer(clickTwice) clickTwice.shouldBeRequiredToFailByGestureRecognizer(clickOnce) clickOnce.shouldRequireFailureOfGestureRecognizer(clickTwice) clickTwice.shouldRequireFailureOfGestureRecognizer(clickOnce) clickOnce