ios - Why is hitTest:withEvent: called three times for each touch? -


i have subclass of uiview in i've overridden hittest:withevent: follows:

- (uiview *)hittest:(cgpoint)point withevent:(uievent *)event {     nslog(@"event = %@", event);     return self; }

for each touch in view, seeing 3 calls hittest:withevent:. these 3 calls made before touch up. output follows:

2011-07-01 09:20:58.553 appname[930:207] event = <uitouchesevent: 0x6a08360> timestamp: 4297.16 touches: {( )} 2011-07-01 09:20:58.553 appname[930:207] event = <uitouchesevent: 0x6a08360> timestamp: 4297.16 touches: {( )} 2011-07-01 09:20:58.554 appname[930:207] event = <uitouchesevent: 0x6a08360> timestamp: 4304.54 touches: {( )}

based on timestamps , addresses, appears if single uitouchesevent object being used , timestamp isn't set until third call. can explain why hittest:withevent: gets called 3 times this? i'm not looking workaround. want understand what's going on.

i had same problem , able solve code. though pointinside , hittest called 3 times, touchesbegan (or touchesended) of uiview touched gets called once. 

- (void)touchesbegan:(nsset *)touches withevent:(uievent *)event {        if (event.type == uieventtypetouches)         nslog(@"%@", self); }   - (uiview *)hittest:(cgpoint)point withevent:(uievent *)event {     if ([self pointinside:point withevent:event])         return self;      return [super hittest:point withevent:event]; }  - (bool)pointinside:(cgpoint)point withevent:(uievent *)event {     if (cgrectcontainspoint([self bounds], point))     {         if (event.type == uieventtypetouches)         {                        return yes;         }     }      return no; }

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