NSArray
代表元素有序、可重复的一个集合,集合中每个元素都有对应的顺序索引。
创建NSArray的常见方法
1、array:创建一个不包含任何元素的空NSARRAY
2、arrayWithObject/initWithObject:创建只包含指定元素的NSArray
3、arrayWithObjects/initWithObjects:创建只包含一个或多个元素的NSArray
4、arrayWithContentsOfFile:读取文件内容来创建NSArray
(以下程序列举了常用的NSArray方法)
//
// main.m
// Array
//
// Created by mac on 14-12-3.
// Copyright (c) 2014年 mac. All rights reserved.
//
#import <Foundation/Foundation.h>
#import "People.h"
//静态创建数组的方法
void staticCreatArray()
{
NSArray * array1 = [NSArray arrayWithObject:@"NSArray"];
NSLog(@"Way 1: %@",array1);
NSArray * array2 = [NSArray arrayWithObjects:@"NSArray1",@"NSArray2",@"NSArray3", nil];
NSLog(@"Way 2: %@",array2);
NSArray * array3 = [NSArray arrayWithArray:array2];
NSLog(@"Way 3: %@",array3);
[array1 release];
[array2 release];
[array3 release];
}
//动态创建数组的方法
void dynamicCreatArray()
{
NSArray * array1 = [[NSArray alloc]initWithObjects:@"1,2,3,4,5",@"HELLO", nil];
NSLog(@"Way 1: %@",array1);
NSArray * array2 = [[NSArray alloc]initWithArray:array1];
NSLog(@"Way 2: %@",array2);
}
//查询集合元素在NSArray中的序列
void searchArray()
{
NSArray * array1 = [NSArray arrayWithObject:@"NSArray"];
NSArray * array2 = [NSArray arrayWithObjects:@"NSArray1",@"NSArray2",@"NSArray3", nil];
NSArray * array3 = [[NSArray alloc]initWithObjects:@"1,2,3,4,5",@"HELLO",@"HELLO", nil];
NSLog(@"%lu",[array1 count]);
NSLog(@"%hhd",[array3 containsObject:@"HELLO"]);
NSLog(@"%@",[array2 lastObject]);
NSLog(@"%@",[array2 objectAtIndex:1]);
NSLog(@"%lu",[array2 indexOfObject:@"NSArray1"]);
NSRange range = NSMakeRange(0, 2);
NSLog(@"%lu",[array2 indexOfObject:@"NSArray2" inRange:range]);
[array3 release];
}
//对数组进行比较
void compareArray()
{
NSArray * array1 = [NSArray arrayWithObject:@"NSArray"];
NSArray * array11 = [array1 copy];
NSArray * array2 = [NSArray arrayWithObjects:@"NSArray1",@"NSArray2",@"NSArray3", nil];
NSArray * array3 = [[NSArray alloc]initWithObjects:@"1,2,3,4,5",@"HELLO",@"HELLO",@"NSArray1", nil];
NSLog(@"%hhd",[array1 isEqualToArray:array11]);
NSLog(@"%@",[array2 firstObjectCommonWithArray:array3]);
[array3 release];
}
//遍历数组
void ergodicArray()
{
NSArray * array2 = [NSArray arrayWithObjects:@"NSArray1",@"NSArray2",@"NSArray3", nil];
//C语言方式
for (int i = 0; i<[array2 count]; i++)
{
NSLog(@"%@",[array2 objectAtIndex:i]);
}
//快速遍历
for (id obj in array2)
{
NSLog(@" %@",obj);
}
//Block方法遍历
[array2 enumerateObjectsUsingBlock:^(id obj,NSUInteger idx,BOOL *stop)
{
if (idx<1)
{
* stop = YES ;
}
NSLog(@"%lu,%@",idx,obj);
}];
//迭代器方法遍历
NSEnumerator * enumerator =[array2 objectEnumerator];
id obj ;
while (obj= [enumerator nextObject]) {
NSLog(@"%@",obj);
}
}
//其他方法
void otherArray()
{
NSArray * array1 = [NSArray arrayWithObject:@"NSArray"];
NSArray * array2 = [NSArray arrayWithObjects:@"NSArray1",@"NSArray2",@"NSArray3", nil];
//快速遍历array
for (id obj in array2)
{
NSLog(@"%@",obj);
}
array2 = [array2 arrayByAddingObject:@"NSArray4"];
for (id obj in array2)
{
NSLog(@" %@",obj);
}
array2 = [array2 arrayByAddingObjectsFromArray:array1];
for (id obj in array2)
{
NSLog(@" %@",obj);
}
NSArray *pathArray = [NSArray arrayWithObjects:@"here", @"be", @"dragons", nil];
NSLog(@"%@",pathArray);
NSLog(@"%@",[pathArray componentsJoinedByString:@"->"]);
NSRange range = NSMakeRange(0, 3);
NSLog(@"%@",[array2 subarrayWithRange:range]);
}
//排序
void sortArray()
{
NSArray * array2 = [NSArray arrayWithObjects:@"NSArray2",@"NSArray1",@"NSArray3", nil];
NSLog(@"Before Sort:%@",[array2 componentsJoinedByString:@" "]);
//选择排序
NSArray * selectSortArray = [array2 sortedArrayUsingSelector:@selector(caseInsensitiveCompare:)];
NSLog(@"After Sort :%@",[selectSortArray componentsJoinedByString:@" "]);
NSArray * array3 = [NSArray arrayWithObjects:@"NSArray2",@"NSArray1",@"NSArray3",@"NSArray5",@"NSArray4", nil];
NSLog(@"Before Sort:%@",[array3 componentsJoinedByString:@" "]);
// main.m
// Array
//
// Created by mac on 14-12-3.
// Copyright (c) 2014年 mac. All rights reserved.
//
#import <Foundation/Foundation.h>
#import "People.h"
//静态创建数组的方法
void staticCreatArray()
{
NSArray * array1 = [NSArray arrayWithObject:@"NSArray"];
NSLog(@"Way 1: %@",array1);
NSArray * array2 = [NSArray arrayWithObjects:@"NSArray1",@"NSArray2",@"NSArray3", nil];
NSLog(@"Way 2: %@",array2);
NSArray * array3 = [NSArray arrayWithArray:array2];
NSLog(@"Way 3: %@",array3);
[array1 release];
[array2 release];
[array3 release];
}
//动态创建数组的方法
void dynamicCreatArray()
{
NSArray * array1 = [[NSArray alloc]initWithObjects:@"1,2,3,4,5",@"HELLO", nil];
NSLog(@"Way 1: %@",array1);
NSArray * array2 = [[NSArray alloc]initWithArray:array1];
NSLog(@"Way 2: %@",array2);
}
//查询集合元素在NSArray中的序列
void searchArray()
{
NSArray * array1 = [NSArray arrayWithObject:@"NSArray"];
NSArray * array2 = [NSArray arrayWithObjects:@"NSArray1",@"NSArray2",@"NSArray3", nil];
NSArray * array3 = [[NSArray alloc]initWithObjects:@"1,2,3,4,5",@"HELLO",@"HELLO", nil];
NSLog(@"%lu",[array1 count]);
NSLog(@"%hhd",[array3 containsObject:@"HELLO"]);
NSLog(@"%@",[array2 lastObject]);
NSLog(@"%@",[array2 objectAtIndex:1]);
NSLog(@"%lu",[array2 indexOfObject:@"NSArray1"]);
NSRange range = NSMakeRange(0, 2);
NSLog(@"%lu",[array2 indexOfObject:@"NSArray2" inRange:range]);
[array3 release];
}
//对数组进行比较
void compareArray()
{
NSArray * array1 = [NSArray arrayWithObject:@"NSArray"];
NSArray * array11 = [array1 copy];
NSArray * array2 = [NSArray arrayWithObjects:@"NSArray1",@"NSArray2",@"NSArray3", nil];
NSArray * array3 = [[NSArray alloc]initWithObjects:@"1,2,3,4,5",@"HELLO",@"HELLO",@"NSArray1", nil];
NSLog(@"%hhd",[array1 isEqualToArray:array11]);
NSLog(@"%@",[array2 firstObjectCommonWithArray:array3]);
[array3 release];
}
//遍历数组
void ergodicArray()
{
NSArray * array2 = [NSArray arrayWithObjects:@"NSArray1",@"NSArray2",@"NSArray3", nil];
//C语言方式
for (int i = 0; i<[array2 count]; i++)
{
NSLog(@"%@",[array2 objectAtIndex:i]);
}
//快速遍历
for (id obj in array2)
{
NSLog(@" %@",obj);
}
//Block方法遍历
[array2 enumerateObjectsUsingBlock:^(id obj,NSUInteger idx,BOOL *stop)
{
if (idx<1)
{
* stop = YES ;
}
NSLog(@"%lu,%@",idx,obj);
}];
//迭代器方法遍历
NSEnumerator * enumerator =[array2 objectEnumerator];
id obj ;
while (obj= [enumerator nextObject]) {
NSLog(@"%@",obj);
}
}
//其他方法
void otherArray()
{
NSArray * array1 = [NSArray arrayWithObject:@"NSArray"];
NSArray * array2 = [NSArray arrayWithObjects:@"NSArray1",@"NSArray2",@"NSArray3", nil];
//快速遍历array
for (id obj in array2)
{
NSLog(@"%@",obj);
}
array2 = [array2 arrayByAddingObject:@"NSArray4"];
for (id obj in array2)
{
NSLog(@" %@",obj);
}
array2 = [array2 arrayByAddingObjectsFromArray:array1];
for (id obj in array2)
{
NSLog(@" %@",obj);
}
NSArray *pathArray = [NSArray arrayWithObjects:@"here", @"be", @"dragons", nil];
NSLog(@"%@",pathArray);
NSLog(@"%@",[pathArray componentsJoinedByString:@"->"]);
NSRange range = NSMakeRange(0, 3);
NSLog(@"%@",[array2 subarrayWithRange:range]);
}
//排序
void sortArray()
{
NSArray * array2 = [NSArray arrayWithObjects:@"NSArray2",@"NSArray1",@"NSArray3", nil];
NSLog(@"Before Sort:%@",[array2 componentsJoinedByString:@" "]);
//选择排序
NSArray * selectSortArray = [array2 sortedArrayUsingSelector:@selector(caseInsensitiveCompare:)];
NSLog(@"After Sort :%@",[selectSortArray componentsJoinedByString:@" "]);
NSArray * array3 = [NSArray arrayWithObjects:@"NSArray2",@"NSArray1",@"NSArray3",@"NSArray5",@"NSArray4", nil];
NSLog(@"Before Sort:%@",[array3 componentsJoinedByString:@" "]);
}
int main(int
argc, const
char * argv[]) {
@autoreleasepool {
// insert code here...
// NSLog(@"Hello, World!");
// staticCreatArray();
// dynamicCreatArray();
// searchArray();
// compareArray();
// ergodicArray();
@autoreleasepool {
// insert code here...
// NSLog(@"Hello, World!");
// staticCreatArray();
// dynamicCreatArray();
// searchArray();
// compareArray();
// ergodicArray();
// otherArray();
// sortArray();
}
return 0;
}