CancelBlocks

Set of functions for dispatching blocks after a delay, with the ability to cancel them. Written in Swift.

Use dispatch_block_t instead of native dispatch_after and save the executing block with type dispatch_cancelable_block_t, afterwards you may safely use it to cancel executing the block by using dispatch_cancel_block_t.

dispatch_cancelable_block_t wraps your block in a block of type (Bool) -> Void which handles cancellation.

Usage example:

var block: dispatch_cancelable_block_t? = dispatch_block_t(1, {
    // Your code 
})
dispatch_cancel_block_t(block)