1 #import <Foundation/Foundation.h> 2 3 @interface Person : NSObject 4 5 @property (nonatomic, strong)NSString *personName; 6 - (id)initWithName:(NSString *)name; 7 8 @end 9 10 #import "Person.h" 11 12 @implementation Person 13 14 - (id)initWithName:(NSString *)name 15 { 16 if (self = [super init]) 17 { 18 _personName = name; 19 } 20 return self; 21 } 22 23 @end 24 25 #import <Foundation/Foundation.h> 26 #import "Person.h" 27 int main(int argc, const char * argv[]) 28 { 29 @autoreleasepool 30 { 31 Person *p1 = [[Person alloc] initWithName:@"张三"]; 32 Person *p2 = [[Person alloc] initWithName:@"李四"]; 33 Person *p3 = [[Person alloc] initWithName:@"王五"]; 34 NSArray *personArray = [[NSArray alloc] initWithObjects:p2, p3, nil]; 35 36 NSMutableArray *array = [[NSMutableArray alloc] init]; 37 //添加元素 38 [array addObject:p1]; 39 [array addObjectsFromArray:personArray]; 40 NSLog(@"%@", array); 41 //删除元素 42 //删除数组内所有的元素 43 // [array removeAllObjects]; 44 //删除数组最后一个元素 45 // [array removeLastObject]; 46 //删除指定元素 47 [array removeObject:p2]; 48 //删除指定下标的元素（注意数组内元素的个数下标问题会导致崩溃） 49 // [array removeObjectAtIndex:2]; 50 NSLog(@"2.%@", array); 51 52 //交换元素的位置 53 [array exchangeObjectAtIndex:0 withObjectAtIndex:1]; 54 NSLog(@"%@", array); 55 } 56 return 0; 57 }
*************补充NSArray***********
1 #import <Foundation/Foundation.h> 2 3 int main(int argc, const char * argv[]) 4 { 5 @autoreleasepool 6 { 7 // OC的数组可以存储不同类型的对象，OC的数组只能存储对象 8 NSArray *array1 = [[NSArray alloc] initWithObjects:@"a", @"b", @"c", @"d", @"e", nil]; 9 // 数组的长度 10 int count = (int)array1.count; 11 NSLog(@"count = %d", count); 12 //判断数组中是否包含对应的对象 13 BOOL isHave = [array1 containsObject:@"c"]; 14 if (isHave) 15 { 16 NSLog(@"存在"); 17 } 18 else 19 { 20 NSLog(@"不存在"); 21 } 22 //取得数组中的最后一个元素 23 NSString *str = [array1 lastObject]; 24 NSLog(@"str = %@", str); 25 //取首元素 26 str = [array1 firstObject]; 27 NSLog(@"str = %@", str); 28 //取出下标为2的元素**** 29 str = [array1 objectAtIndex:2]; 30 NSLog(@"str = %@", str); 31 //打印元素所对应的下标(如果元素不存在则打印-1的值) 32 int index = (int)[array1 indexOfObject:@"d"]; 33 NSLog(@"index = %d", index); 34 35 //数组的遍历（1.基本的for循环通过下标逐一取出查看。2.for in 快速枚举。3.枚举器(迭代器)） 36 for(int i = 0; i < count; ++i)//int count = (int)array1.count; 37 { 38 NSLog(@"%@", array1[i]); 39 } 40 //或者 41 for(int i = 0; i <count; ++i) 42 { 43 NSString *str1 = [array1 objectAtIndex:i]; 44 NSLog(@"str1 = %@", str1); 45 } 46 //2.(如果使用快速枚举，我们需要让数组中元素的类型保持一致) 47 for(NSString *str2 in array1) 48 { 49 NSLog(@"str2 = %@", str2); 50 } 51 //3.枚举器 52 for(id object in array1) 53 { 54 NSLog(@"object = %@", object); 55 } 56 57 return 0; 58 } 59 }
1 2016-08-10 15:32:58.788 NSArray[1308:191388] count = 5 2 2016-08-10 15:32:58.789 NSArray[1308:191388] 存在 3 2016-08-10 15:32:58.789 NSArray[1308:191388] str = e 4 2016-08-10 15:32:58.789 NSArray[1308:191388] str = a 5 2016-08-10 15:32:58.789 NSArray[1308:191388] str = c 6 2016-08-10 15:32:58.789 NSArray[1308:191388] index = 3 7 2016-08-10 15:32:58.789 NSArray[1308:191388] a 8 2016-08-10 15:32:58.789 NSArray[1308:191388] b 9 2016-08-10 15:32:58.789 NSArray[1308:191388] c 10 2016-08-10 15:32:58.790 NSArray[1308:191388] d 11 2016-08-10 15:32:58.790 NSArray[1308:191388] e 12 2016-08-10 15:32:58.790 NSArray[1308:191388] str1 = a 13 2016-08-10 15:32:58.790 NSArray[1308:191388] str1 = b 14 2016-08-10 15:32:58.790 NSArray[1308:191388] str1 = c 15 2016-08-10 15:32:58.790 NSArray[1308:191388] str1 = d 16 2016-08-10 15:32:58.790 NSArray[1308:191388] str1 = e 17 2016-08-10 15:32:58.790 NSArray[1308:191388] str2 = a 18 2016-08-10 15:32:58.790 NSArray[1308:191388] str2 = b 19 2016-08-10 15:32:58.790 NSArray[1308:191388] str2 = c 20 2016-08-10 15:32:58.790 NSArray[1308:191388] str2 = d 21 2016-08-10 15:32:58.790 NSArray[1308:191388] str2 = e 22 2016-08-10 15:32:58.790 NSArray[1308:191388] object = a 23 2016-08-10 15:32:58.791 NSArray[1308:191388] object = b 24 2016-08-10 15:32:58.791 NSArray[1308:191388] object = c 25 2016-08-10 15:32:58.791 NSArray[1308:191388] object = d 26 2016-08-10 15:32:58.791 NSArray[1308:191388] object = e 27 Program ended with exit code: 0