Objc Basic Learning Record 3

In learning objective-C,

Array

1. nsarray,

This is an immutable array. Objects in the array cannot be modified or deleted. Any objective object pointer can be stored.

INT and Char Types cannot be stored, and must be converted to the required type.

 

To quickly enumerate the values in the array, use in.

 
1 For(Nsstring * eleementInMyarray)2Nslog (@"Myarray is % @", Element );
 

2. nsmutablearray

This is a variable array. You can add or delete objects to it.

A. Add the addobject method.

[Mylistarray addobject: Str];
 

B. Delete removeobject

 
[Mylistarray removeobject: Str];
 

C. Modify replaceobjectatindex, an element in the array.

 
[Mylistarray replaceobjectatindex: Id withobject: Str];
 

D. inserobject insert element,

 
[Mylistarray insertobject: Str atindex: Id];