ios - Is it possible to customize swiping gesture recognition that triggers UIScrollView scroll? -

-

i've created custom subclass uiscrollview , implemented touchesbegan, touchesmoved, touchesended , touchescancelled methods.

however i'm not satisfied how things work. particularly, when mentioned methods getting called , when uiscrollview decide scroll(drag).

uiscrollview scrolls if difference between first touch point , last touch point little in vertical direction. can swipe horizontally , uiscrollview going scroll or down depending on small difference.(which fine in normal use cases)

default uiscrollview behavior

both of these swipes cause uiscrollview scroll downwards.

however i'm interested possible adjust somehow, behaves this:

desired behavior

basically near horizontal swiping gets picked touchesbegan , related methods , not initiate scroll. green swiping direction still initiate scrolling...

edit:

i forgot mention, touchesbegan , relatives called if hold finger short period of time on screen , move around. not classical swiping gesture...

ivan, think trying same effect facebook page is, , drag scrollview , letting scrollview follow finger, if correct, suggest forget touches events, , start uipangesture , best in these cases, inside delegate calls gesture, put following code it:

    //the sender view, in case scollview     uiscrollview* scr = (uiscrollview*)sender.view;     //disable scrolling flag sake of user experience     [scr setscrollenabled:false];      //get current translation point of scrollview in respect main view     cgpoint translation = [sender translationinview:self.view];      //set view center new translation point      float translationpoint = scr.center.x + translation.x;     scr.center = cgpointmake(translationpoint,scr.center.y);     [sender settranslation:cgpointmake(0, 0) inview:self.view];

Popular posts from this blog

Php - Delimiter must not be alphanumeric or backslash -

-
this question has answer here: delimiter must not alphanumeric or backslash , preg_match 5 answers this question has been asked don't know how fix problem in situation. getting following php errror: php message: php warning: preg_match(): delimiter must not alphanumeric or backslash in... on line 227 line 227 following: if (preg_match($match, $_server['http_user_agent'])) and function: $oslist = array ( 'windows 3.11' => 'win16', 'windows 95' => '(windows 95)|(win95)|(windows_95)', 'windows 98' => '(windows 98)|(win98)', 'windows 2000' => '(windows nt 5.0)|(windows 2000)', 'windows xp' => '(windows nt 5.1)|(windows xp)', 'windows server 2003' => '(windows nt 5.2)', 'windows vista' => '(windows nt 6.0)', 'w...
Read more

Delphi interface implements -

-
i expect reference counting should work on outer aggregating object in interface implementation. if can refer example: clarity in classes implementing multiple interfaces (alternative delegation): here minimal reproduction of behaviour: program so16210993; {$apptype console} type ifoo = interface procedure foo; end; tfooimpl = class(tinterfacedobject, ifoo) procedure foo; end; tcontainer = class(tinterfacedobject, ifoo) private ffoo: ifoo; public constructor create; destructor destroy; override; property foo: ifoo read ffoo implements ifoo; end; procedure tfooimpl.foo; begin writeln('tfooimpl.foo called'); end; constructor tcontainer.create; begin inherited; ffoo := tfooimpl.create; end; destructor tcontainer.destroy; begin writeln('tcontainer.destroy called');//this line never runs inherited; end; procedure main; var foo : ifoo; begin foo := tcontainer.create; foo.foo; end; begin main; readln...
Read more

css - invalid property value for padding -

-
i getting invalid property value padding , don't know why. code written in ruby btw. when check browser has right value pixels, crossed out w line , isn't reading attribute. in advance. <% mywaldo = mapping::mywaldos.sample %> <!doctype html> <html> <head> <title>sinatra single-serve</title> <link href="css/bootstrap.css" rel="stylesheet" type="text/css"/> <style> div { width: 1024px; height: 768px; background-image: url("img/waldos/<%= mywaldo[0]%>") ; } #waldo { position:absolute; top: <%= mywaldo[2]%>; left: <%= mywaldo[1]%>; padding: <%= mywaldo[3]%>, <%= mywaldo[4]%>; } </style> </head> <body> <div> <a id="waldo" href="">aa</a> </div> <%= yield %> </body> ...
Read more