Performance Optimization Instruments-leaks tool use

Performance optimization uses the instruments leaks tool to detect memory leaks.

Memory leaks, that is, after the memory is allocated and used, even if the memory is no longer in use, has not been released, resulting in the use of other objects can not be used.

In Arc memory management mode, the resulting memory leaks are as follows:

(1) animation effect generated by the infinite loop

(2) Strong references between multiple objects

(3) The use of timer Nstimer

(4) Strong references to code block blocks

Workaround:

(1) When the view controller is about to disappear, remove the animation effects;

(2) using weak reference between objects;

(3) Stop timing effects When the view controller is about to disappear;

(4) using weak references in the code block;

Find the leaks tool in instruments

Method 1:

Method 2:

Use