#import <Foundation/Foundation.h>
int main(int argc, const char *
argv[])
{
// 创建数组
NSArray *arr1 = nil;
// NSLog(@"%p", arr1);
NSObject *obj = [NSObject new];
arr1 = [NSArray arrayWithObjects:@"One", @"Two", @"Three",
obj, nil];//结束标识，相当于C语言的“\0”
// NSLog(@"%p", arr1);
NSLog(@"arr1: %@",
arr1);
// 推荐下面的新语法
NSString *str = @"Hello";
NSArray *arr2 = @[@"zhangsan", @"lisi", @"wangwu", @"zhaoliu" ,@"tianqi",
str];//这种方法自动在后面添加了nil
NSLog(@"arr2: %@",
arr2);
// 访问数组成员 objectAtIndex
// NSObject *tmpObj = [arr1 objectAtIndex:3];
id tmpObj = [arr1 objectAtIndex:3];
NSLog(@"tmpObj: %@",
tmpObj);
// 推荐使用下面的新语法
tmpObj = arr2[2];
NSLog(@"arr2[2]: %@",
tmpObj);
// 可变数组
NSMutableArray *firstArr = [NSMutableArray arrayWithCapacity:30];
// 添加
[firstArr addObject:@"One"];
[firstArr addObject:@"Two"];
[firstArr addObject:@"Three"];
[firstArr addObject:@"Four"];
[firstArr addObject:@"Five"];
NSLog(@"The Mutable Array: %@",
firstArr);
NSMutableArray *secArr = [NSMutableArray arrayWithArray:arr2];
NSLog(@"secArr: %@",
secArr);
// 删除
[secArr removeObject:@"tianqi"];
NSLog(@"==secArr: %@",
secArr);
[secArr removeObjectAtIndex:2];
NSLog(@"===secArr: %@",
secArr);
// 插入
[secArr insertObject:@"wangwu" atIndex:2];//id 是对象
index 是位置
NSLog(@"after insert: %@",
secArr);
// 替换
NSObject *someObj = [NSObject new];
[secArr replaceObjectAtIndex:4 withObject:someObj];
NSLog(@"after replace: %@",
secArr);
// C语言遍历数组
NSUInteger number = [secArr count];
for (int i
= 0; i < number; i++) {
id obj = secArr[i];
NSLog(@"%@",
obj);
}
// 通过枚举器来遍历数组（正着遍历）
NSEnumerator *enum1 = [secArr objectEnumerator];
id obj1;
NSLog(@"*************************");
while (obj1 = [enum1 nextObject])
{
NSLog(@"obj1: %@",
obj1);
}
// 通过枚举器来遍历数组（倒着遍历）
NSEnumerator *enum2 = [secArr reverseObjectEnumerator];
while (obj1 = [enum2 nextObject])
{
NSLog(@"reverse: %@",
obj1);
}
NSLog(@"============================");
// 快速枚举
for (id obj in secArr)
{
NSLog(@"Fast Enumeration: %@",
obj);
}
return 0;
}