ios - Required single tap and double tap event on UIButton? -

there 3 uibutton events available:

• uitouchupinside
• uitouchdown
• uitouchdownrepeat

my problem is:

i have button (play-pause). first time shows play button, if user taps on it, starts process. , button image changes pause , tag changes 1.

if user tap on pause button, pauses process , image changes play , tag 0.

now problem is, if user taps multiple times, not executing properly. double click on desktop mouse.

i have tried 3 above method, times, first 2 methods getting called. how avoid that.

if double tap, process should started once only.

please suggest.

edit: using touchupinside event only, there checking

if (btn.tag == 0) {  // change pause button // start process  btn.tag = 1; } else if (btn.tag == 1) {  // change play button // stop process  btn.tag = 0; } 

but causing issue when user taps on button. because process running on thread, takes time load , stop. meanwhile use has double tapped on button.

perhaps instead of uibutton should use uiview 2 uitapgesturerecognizers? 1 of them have numberoftapsrequired = 2, other 1 have numberoftapsrequired = 1. use method requiresgesturerecognizertofail make sure won't have them both calling target methods. can add logic want tap handling.

edit: actually, although above answer kind of workaround, fail if user taps 3 or more times. , since can't make gesture recognizer every number of taps 1 infinity, fail in cases. try this:

btn.enabled = no; if (btn.tag == 0) {  // change pause button // start process  btn.tag = 1; } else if (btn.tag == 1) {  // change play button // stop process  btn.tag = 0; } btn.enabled = yes;