ios - How can I make a simple pull to refresh control without any libraries? -

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i'm using core animation make moon-orbiting-earth animation, , use activity indicator of sorts in pull-to-refresh controller on uitableview.

the problem is, cannot make custom activity indicator core animation- sequences of images allowed. since cannot use subclassed/modified uiactivityindicatorview, can't use apple's uirefreshcontrol (pull refresh) , need make own.

i aware uitableview has header property using, not sure how load view header upscreen, make elastic effect, , monitor/change table position programmatically callback.


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