CODEWITHSUNDEEP
iphoneobjective-canimation
Andrew
Andrew

Reputation: 16051

UIViewAnimation blocks user interaction

I have a UIView following the users finger as they move it around inside my app. Sometimes, other things on screen are animating with UIViewAnimation blocks, but this freezes the tracking of their finger, so if they continue moving their finger during the animation, it won't follow. How can i stop the animation from blocking up the main thread?

Upvotes: 4

Views: 996

Answers (4)

matt
matt

Reputation: 535169

Note that if you link for iOS 5 this problem will go away all by itself. Under iOS 5, block-based animation of a view does not turn off user interaction for other views. This is what Apple should have done in the first place.

Upvotes: 0

Stefan
Stefan

Reputation: 1496

Try using UIViewAnimationOptionAllowUserInteraction with [UIView animateWithDuration:delay:options:animations:completion:]

Upvotes: 10

teriiehina
teriiehina

Reputation: 4761

you can use the NSObject's method: performSelector:onThread:withObject:waitUntilDone:

More details in Apple NSObject Documentation

Upvotes: 1

Ilanchezhian
Ilanchezhian

Reputation: 17478

If there is any other thing on the screen is animated, that would also be done in main thread. And the current finger tracking would also be done in main thread. So definitely there would be some blocking.

To get rid of that, we can optimize our code using blocks and GCD.

Upvotes: 0

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