Variable array of SNAIL-OC learning Nsmutablearray

Variable group Nsmutablearray all methods that inherit from Nsarray Nsarray apply to mutable arrays

Here are some initialization methods for mutable arrays

#import <foundation/foundation.h>int Main (int argc, const char * argv[]) {@autoreleasepool {//variable        Groups inherit from immutable arrays//NULL variable array nsmutablearray * array = [[Nsmutablearray alloc] init];        Incoming 0 is a new empty array nsmutablearray * array2 = [[Nsmutablearray alloc] initwithcapacity:0];                Creates a new array with an array Nsmutablearray * array3 = [[Nsmutablearray alloc] initwitharray:array];                Initialize Add object nil is a placeholder for nsmutablearray * Array4 = [[Nsmutablearray alloc] initwithobjects:@ "DSA" @ "SD", nil];                The simple initialization method is only applicable to non-variable groups//nsmutablearray * array5 = @[@ "DSA" @ "SD"];        The class method form creates an array Nsmutablearray * arr1 = [Nsmutablearray array];        Nsmutablearray * arr2 = [Nsmutablearray Arraywitharray:array];        A variable array of length 0 Nsmutablearray * ARR3 = [Nsmutablearray arraywithcapacity:0];            Nsmutablearray * ARR4 = [Nsmutablearray arraywithobjects:@ "SDA", @ "ASD", nil]; } return 0;}

Similar to a mutable array, a variable group can have a corresponding method for the elements inside it.

#import <foundation/foundation.h>int Main (int argc, const char * argv[]) {    @autoreleasepool {                Nsmutablearray * array = [[Nsmutablearray alloc] init];                Add an element        [array addobject:@ "one1"];        Nsarray * array2 = @[@ "SDA" @ "sad" @ "one"];        Add multiple elements        [array addobjectsfromarray:array2];                Delete all objects with the same parameters        [array removeobject:@ "one"];        Deletes the element at the specified location        [array removeobjectatindex:0];        Delete all elements        //If an empty array call below this method data will be error        [array removeallobjects];                Delete the last element, but the empty array does not error        [array removelastobject];        Delete multiple elements        [array removeobjectsinarray:array2];                Starting with the subscript, remove several elements  from subscript 0 to delete the two        nsrange range = nsmakerange (0, 2);        [Array removeobjectsinrange:range];            }    return 0;}

Some methods for elements of a variable group

#import <foundation/foundation.h>int Main (int argc, const char * argv[]) {    @autoreleasepool {                Nsmutablearray * array = [[Nsmutablearray alloc] init];               The reset array parameter can be any array        [array setarray:@[@ "Snail", @ "Daodao", @ "Jian"];                Replace the element labeled 1 with the @ "Jianjian"        [array replaceobjectatindex:1 withobject:@ "Jian"];                Swap the element with subscript 1 followed by the element labeled 2        [array exchangeobjectatindex:1 withobjectatindex:2];                Inserting subscript 2 will insert a new element in the order of other elements to move backwards        [Array insertobject:@ "J" atindex:2];            }    return 0;}

Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.

Variable array of SNAIL-OC learning Nsmutablearray