iOS Development--ui Advanced Chapter (IX) The ingenious use of block

There are mentioned in the preceding notice, agent, KVO and other methods to assist the communication between different objects, and then introduce the block to solve the problem today

Then the previous example

Here is the function to retell again

I compare the block with the notice, of course, the agent and kvo how to achieve it has been in the previous article is clear

1. First create the Block property in the cell model

2. Call Block when you click the Plus minus button

3, in the controller's Cellforrowatindexpath: method to assign a value to block

This can also be used with block and before with the notification, agent, KVO to achieve the effect of message communication

And finally put the notice here as a comparison.

iOS Development--ui Advanced Chapter (IX) The ingenious use of block