sender

Xcode meanings in various Sent Event

In Xcode,We give iOS platform App,Will inevitably have to add a button to bind an event,At this time there is a statement,You will find a button touch event already not before a "Touch Up Inside" so simple。

Referring to FIG title,There are at least not so much in some events can be for your choice,In more features at the same time,Novices may be more ignorant of the force?[……]

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