touchesBegan not called in NSScrollView subclass until the first mouse/trackpad click on the view










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I subclass an NSScrollView to monitor 2-finger panning with touchesBegan/Moved/Ended. It works as long as I click on the view once after the app is launched. Then it will always work till the next time I start the app fresh.



I think I'm missing out something very obvious here. Perhaps a NSScrollView/NSView property that allows it to immediately accept touches. Can someone help?



By the way, the NSScrollView is one automatically created in Storyboard when I add a NSTableView.










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    0















    I subclass an NSScrollView to monitor 2-finger panning with touchesBegan/Moved/Ended. It works as long as I click on the view once after the app is launched. Then it will always work till the next time I start the app fresh.



    I think I'm missing out something very obvious here. Perhaps a NSScrollView/NSView property that allows it to immediately accept touches. Can someone help?



    By the way, the NSScrollView is one automatically created in Storyboard when I add a NSTableView.










    share|improve this question
























      0












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      0








      I subclass an NSScrollView to monitor 2-finger panning with touchesBegan/Moved/Ended. It works as long as I click on the view once after the app is launched. Then it will always work till the next time I start the app fresh.



      I think I'm missing out something very obvious here. Perhaps a NSScrollView/NSView property that allows it to immediately accept touches. Can someone help?



      By the way, the NSScrollView is one automatically created in Storyboard when I add a NSTableView.










      share|improve this question














      I subclass an NSScrollView to monitor 2-finger panning with touchesBegan/Moved/Ended. It works as long as I click on the view once after the app is launched. Then it will always work till the next time I start the app fresh.



      I think I'm missing out something very obvious here. Perhaps a NSScrollView/NSView property that allows it to immediately accept touches. Can someone help?



      By the way, the NSScrollView is one automatically created in Storyboard when I add a NSTableView.







      macos gesture nsscrollview nsevent






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      asked Nov 12 '18 at 9:50









      honchenghoncheng

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          Found the solution.



          This is actually a menu bar app, so the view controller is inside a NSPopover. Showing the app in the popover does not make the app the activate app. I have to use the following line to make it active before it can respond to touches.



          NSApplication.shared.activate(ignoringOtherApps: true)





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            1 Answer
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            active

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            active

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            active

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            0














            Found the solution.



            This is actually a menu bar app, so the view controller is inside a NSPopover. Showing the app in the popover does not make the app the activate app. I have to use the following line to make it active before it can respond to touches.



            NSApplication.shared.activate(ignoringOtherApps: true)





            share|improve this answer



























              0














              Found the solution.



              This is actually a menu bar app, so the view controller is inside a NSPopover. Showing the app in the popover does not make the app the activate app. I have to use the following line to make it active before it can respond to touches.



              NSApplication.shared.activate(ignoringOtherApps: true)





              share|improve this answer

























                0












                0








                0







                Found the solution.



                This is actually a menu bar app, so the view controller is inside a NSPopover. Showing the app in the popover does not make the app the activate app. I have to use the following line to make it active before it can respond to touches.



                NSApplication.shared.activate(ignoringOtherApps: true)





                share|improve this answer













                Found the solution.



                This is actually a menu bar app, so the view controller is inside a NSPopover. Showing the app in the popover does not make the app the activate app. I have to use the following line to make it active before it can respond to touches.



                NSApplication.shared.activate(ignoringOtherApps: true)






                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered Nov 13 '18 at 8:25









                honchenghoncheng

                1,8271113




                1,8271113





























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