ios - What is the touches canceled event, and how is it different from touches ended -

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i don't understand apple means touches canceled event , how called.

i'm not sure tim addressed question i'll take shot @ it.

touchescanceled called when os needs interrupt user. gives chance clean whatever you've been doing in touchesbegan , touchesmoved.

more specifically, called when user puts phone his/her face turning screen off, or if notification incoming call or new text message occurs.


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