OC, oc Language

OC, oc Language

I. Reference Counter

1> stack and stack

2> Introduction

3> Basic Concepts

4> Basic Methods

Ii. multi-object memory management

1> basic usage

• When an object exists, the retain operation is performed on the object.
• When an object is discarded, the release operation is performed on the object.
• If the retain operation is performed, the release operation is performed.

2> memory management of the set Method

3> @ property impact on memory

4> loop inclusion and circular reference

Iii. autorelease

1> basic usage

2> usage notes

• The creation and release of the automatic release pool follow the stack rules.
• Calling the autorelease method does not affect the reference counter.
• The autorelease method delays the object release time. Do not use objects that occupy a large amount of memory.
• An object cannot call the autorelease method multiple times.
• An object cannot use both the autorelease method and the release method.

3> common applications

• Quickly create an object that automatically releases the pool

  ① A class method is usually designed to quickly create an object in the Auto Release pool ② The method name usually starts with the class name ③ when the class is created, use self to call the alloc, init, and autorelease methods. Do not use the class name

   

Iv. ARC

1> basic usage

2> @ property's strong and weak Parameters

• The strong parameter is equivalent to the retain parameter.
• The weak parameter is equivalent to the assign parameter.