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:@" "]);
}
int main(int
argc, const
char * argv[]) {
@autoreleasepool {
// insert code here...
// NSLog(@"Hello, World!");
// staticCreatArray();
// dynamicCreatArray();
// searchArray();
// compareArray();
// ergodicArray();
// otherArray();
// sortArray();
}
return
0;
}