ios - Recognize two fingers swipe down gesture in UITableView -


i want add 2 fingers swipe , down gestures in uitableview. idea scroll through cells using 1 finger pan gesture , other action using 2 fingers swipe up/down gestures. i'd achieve similar experience tweetbot's night mode toggle: https://vine.co/v/hf5j1y7hubt

this code:

func setupgesturerecognizer() {      swipeup = uiswipegesturerecognizer(target: self, action: "handleswipe")     swipedown = uiswipegesturerecognizer(target: self, action: "handleswipe")      swipeup.direction = uiswipegesturerecognizerdirection.up     swipedown.direction = uiswipegesturerecognizerdirection.down      swipeup.numberoftouchesrequired = 2     swipedown.numberoftouchesrequired = 2      self.tableview.pangesturerecognizer.maximumnumberoftouches = 1      self.tableview.pangesturerecognizer.requiregesturerecognizertofail(swipeup)     self.tableview.pangesturerecognizer.requiregesturerecognizertofail(swipedown)      self.tableview.addgesturerecognizer(swipeup)     self.tableview.addgesturerecognizer(swipedown)  }  func handleswipe() {     print("swiped!")     let alert = uialertcontroller(title: "gesture recognizer", message: "swipe detected", preferredstyle: uialertcontrollerstyle.alert)     let action = uialertaction(title: "ok", style: uialertactionstyle.default, handler: nil)     alert.addaction(action)     self.presentviewcontroller(alert, animated: true, completion: nil) }

setupgesturerecognizer() called in viewdidload()

i alert when swipe or down 2 fingers when use pan gesture there's significant lag before table moves. it's time pan gesture needs wait make sure swipe gesture fails:

it makes more sense me set requiregesturerecognizertofail this: swipedown.requiregesturerecognizertofail(self.tableview.pangesturerecognizer) when tried swipe gesture didn't work @ all. think there's problem pangesturerecognizer failing. why doesn't fail when use 2 fingers if explicitly stated should accept maximumnumberoftouches = 1 ?

do know how make these gestures interact each other?

remove these lines

self.tableview.pangesturerecognizer.requiregesturerecognizertofail(swipeup) self.tableview.pangesturerecognizer.requiregesturerecognizertofail(swipedown)

set gesture delegate swipeup , swipedown

swipedown.delegate = self swipeup.delegate = self

and handle gesture delegate failure dynamically.

func gesturerecognizer(gesturerecognizer: uigesturerecognizer, shouldrecognizesimultaneouslywithgesturerecognizer othergesturerecognizer: uigesturerecognizer) -> bool {     return true }

return true always. take care whether swipe being handled or pan.


Comments

Post a Comment

Popular posts from this blog

get url and add instance to a model with prefilled foreign key :django admin -

Image
i have page in each contest shown in row. each row contains contest id , link other model names have foreign key contest. news model: class news(models.model): title = models.charfield(max_length=50, null=true) description = models.textfield() time = models.timefield( default= datetime.datetime.now().time()) contest = models.foreignkey(contest) i want use admin adding , changing these models. want when user clicks on 'news' has foreign key contest id=1, shows list of news value foreign key. use {% instance in instances %} <tr class="{% cycle 'row1' 'row2' %}"> <td>{{ instance.title }}</td> <td>{{ instance.starttime }}</td> <td>{{ instance.timespan }}</td> <td>{{ instance.date }}</td> <td><a href="/adm...
Read more

android - Keyboard hides my half of edit-text and button below it even in scroll view -

i having trouble keyboard covers edit-text , half of button in scroll view. here's layout , please tell me how should resolve problem. many questions on topic none of them s working me. <?xml version="1.0" encoding="utf-8"?> <linearlayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:background="@drawable/bg" android:layout_height="match_parent"> <scrollview android:layout_width="match_parent" android:fillviewport="true" android:layout_height="match_parent"> <relativelayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical"> <linearlayout android:layout_width="match_parent" android:layout_height="w...
Read more

css - Make div keyboard-scrollable in jQuery Mobile? -

from can tell, although jquery-mobile-powered pages can contain divs overflow set scroll or auto, , these divs can scrolled one-screen bar or mouse wheel, cannot scrolled using arrow keys, page-up/page-down, or home/end. instead, official "page" div (with data-role="page") absorbs input. perhaps other divs can't acquire focus, i'm not sure. is there way around this? edit: jsfiddle of simple example: https://jsfiddle.net/qogz0shx/ <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js"></script> <script src="https://ajax.googleapis.com/ajax/libs/jquerymobile/1.4.5/jquery.mobile.min.js"> </script> <link rel="stylesheet" href="https://code.jquery.com/mobile/1.4.5/jquery.mobile-1.4.5.css"/> <style> #outer { overflow:scroll; height: 50vh; width: 50vw; } #inner { height: 500vh; width: 500vw; } ...
Read more