Stop dispatch_after

Question

I use an animation for specify a tip to help the interaction with delay using these:

 let delay = 1.8 * Double(NSEC_PER_SEC)
    let time = dispatch_time(DIS         


        

Answer 1

iOS 8 and OS X Yosemite introduced dispatch_block_cancel that allow you to cancel them before they start executing

You declare one variable in class as follows:

var block: dispatch_block_t?

Init block variable and provide it in dispatch_after:

block = dispatch_block_create(DISPATCH_BLOCK_INHERIT_QOS_CLASS) {
  print("I executed")
}
let time: dispatch_time_t = dispatch_time(DISPATCH_TIME_NOW, Int64(5 * NSEC_PER_SEC))
dispatch_after(time, dispatch_get_main_queue(), block!)

After that you can cancel it as follows:

dispatch_block_cancel(block!)