Object-C-NSArray

NSArray *fruitArray=[[NSArray alloc] initWithObjects:@"apple",@"banana",@"pear",nil];开辟一个不可变的数组

NSString *obj=[fruitArray objectAtIndex:1];

NSArray *names=@[@"tom",@"jack",@"maggie"];

NSMutableArray *languages=[NSMutableArray array];

[languages addObject:@"c++"];

[languages addObject:@"Objc"]; 添加元素

[languages insertObject:@"swift" atIndex:1];

[languages removeObject:@"c++"];

[languages removeAllObjects];

[languages removeObjectAtIndex:0];

[languages replaceObjectAtIndex:0 withObject:@"c#"];

 数组：
         //1.不可变数组
 //        NSArray *fruitArr = [[NSArray alloc]initWithObjects:@"apple",@"banana",@"pear",@"watermelon",@"longan",nil];
 //        NSLog(@"%@",fruitArr);
 //        NSLog(@"%lu",[fruitArr count]);
 //        NSString *obj = [fruitArr objectAtIndex:2];
 //        NSLog(@"%@",obj);
 //
 //        NSArray *appleArr = [NSArray arrayWithObjects:@"apple",@"banana",@"pear",nil];
 //        NSLog(@"%@",appleArr);
 //
 //        NSArray *names = @[@"tom",@"jack",@"kitty"];
 //        NSLog(@"%@",names);

         //2.可变数组
          NSMutableArray *languages=[NSMutableArray array];
         [languages addObject:@"c++"];
         [languages addObject:@"oc "];
         [languages addObject:@"java"];
         [languages addObject:@"php"];
         NSLog(@"%@",languages);
         [languages insertObject:@"swift" atIndex:];
         NSLog(@"%@",languages);
         [languages removeObject:@"php"];
         [languages removeObjectAtIndex:];
         [languages replaceObjectAtIndex: withObject:@"c#"];
         NSLog(@"%@",languages);

         //数组的遍历
 //        for (int i=0; i<[languages count]; i++) {
 //            NSLog(@"第%d个对象：%@",i+1,[languages objectAtIndex:i]);
 //        }
         //
         for (NSString *obj in languages) {
             NSLog(@"%@",obj);
         }

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