Nsmutablearray variable array-objective-C

Nsarray is a static array that does not modify or add elements to the array. Therefore, nsarray alone is not enough. Nsmutablearray came into being to meet our needs.

Summary of common nsmutablearray Methods

Array	Create an empty array
+ (ID) arraywithcapacity: Size	Create an array and specify the size.
-(ID) initwithcapacity: Size	Initializes a new allocated array and specifies the size.
-(Void) addobject: OBJ	Add object OBJ to the end of Array
-(Void) insertobject: OBJ atindex: I	Insert object OBJ to the position where the index is I
-(Void) replaceobject: OBJ atindex: I	Use OBJ to replace the element of the index in the array.
-(Void) removeobject: OBJ	Delete all objects with OBJ from the array
-(Void) removeobjectatindex: I	Delete the image with index I from the array
-(Void) sortusingselector :( SEL) Selector	Sort the Array Using the comparison method provided by Selector