Nsarray----Nsmutablearray

Nsarray

Foundation Array (Nsarray) is an ordered collection of objects

Nsarrayintfloat compatible, Span style= "font:11.0px ' Heiti sC light ';" > so in Objective-c program, array to store the base data type

Nsarray? Once created, it is no longer possible to make changes to it , and if you want to add, delete, change the array, you need to use Nsarray subclass Nsmutablearray To create the object

Nsarray Common Methods

+arraywithobjects: Use a set of objects to create? An array (note : 1, the method can receive a variable number of arguments.) 2, last? A value specified as nil, indicating the end of the parameter list )

-objectatindex: retrieving elements in an array with an array index

-count: Returns the number of array elements

Nsmutablearray

Nsmutablearray is a subclass of Nsarray, inheriting the

Nsarray all methods , and adds a new method

Nsmutablearray used to handle mutable arrays

+arraywithcapacity: specifying initial capacity for variable arrays

-addobject: Add to the end of a mutable array? An element

-addobjectsfromarray: Add all the elements of an array to the array that called the method

-insertobject:atindex: Add an element to an array-specified bit position

-removeobjectatindex: moves an element in the specified position in the divisor group

-removeobject: Assigning an element in the divisor group

Fast traversal

for (class name * Object Name in the object to traverse )

{

//. . .

}

//

Main.m

Shiyueshihaoshuzu

//

Created by the iphone on 11-10-10.

Copyright year __mycompanyname__. Allrights reserved.

//

#import <Foundation/Foundation.h>

int main (int argc,const char * argv[])

{

@autoreleasepool {

NSAutoreleasePool* Pool=[[nsautoreleasepoolalloc]init];

Insert Codehere ...

      nsarray *array=[nsarrayarraywithobjects: @ "one" ,@ "and" ,@ "no" ,nil];//  Create an array, Nil Indicates the end of the argument list

NSLog (@ "%@", array);

Nsarray * arr=[nsarrayarraywithobjects:@ "Hello",nil];

NSLog (@ "%@", arr);

ID rr=[array objectatindex:1]; retrieving elements in an array with an array index

NSLog (@ "id%@", RR);

longint I=[arraycount]; The number of elements in the//output array

NSLog (@ "%ld", I);

[nsmutablearrayarraywithcapacity:]; Allocating memory space

Nsmutablearray*nsarr=[nsmutablearrayarraywithobjects:@ "HI",@ "Hello",Nil];

[Nsarraddobject:@ "No"];//-addobject: Add to the end of a mutable array? An element

NSLog (@ "%@", Nsarr);

Nsmutablearray*nsarr2=[nsmutablearray arraywithobjects:@ "A",@ "B",Nil];

[NsarrAddobjectsfromarray: Nsarr2];//-addobjectsfromarray: Add all the elements of an array to the array that called the method, Adds the contents of an array to another array

NSLog(@ "---------%@", Nsarr);

[Nsarr2 insertobject:@ "C" atindex:1];

NSLog (@ "%@", nsarr2);

[Nsarr2removeobjectatindex:0];//-removeobjectatindex: removes the element at the specified position in the divisor group

NSLog (@ "%@", nsarr2);

[Nsarr2removeobject:@ ' B '];//-removeobjectatindex: removes the element at the specified position in the divisor group

NSLog (@ "%@", nsarr2);

For (NSString * tem in Array)// traversal

{

NSLog (@ "tem is:%@", tem); elements inside the output array

}

NSLog(@ "--------------------");

for (inti=0;i<[arraycount];i++)// similar to C inside

{

NSLog (@ "%@", [arrayobjectatindex:i]);

}

//}

[Pool drain];

return 0;

}//

Nsarray----Nsmutablearray