Objective-C learning notes-Part 12-Multithreading

Use@ Synchronized () indicates a synchronous method.

The method for implementing synchronization is different from other language types by using a mutex lock. The locked object determines the size of the lock range. For example, the locked instance object only takes effect for the current instance, the lock class object takes effect for all instances.

WhenCodeWhen an exception is thrown, it will be unlocked during the running, and the following code will wait for the code to execute this synchronization method...