iOS技术文档No.20 Foundation_NSArray和

NSArray和SMutableArray是我们开发时非常常用的了，这里也就不讲太多了！

//类方法数组创建  
        NSArray *array1 = [NSArray arrayWithObject:@"obj"];  
        NSArray *array2 = [NSArray arrayWithObjects:@"obj1", @"obj2", @"obj3", nil];  
        NSArray *array3 = [NSArray arrayWithArray:array2];  
        NSLog(@"array1 :%@", array1);  
        NSLog(@"array2 :%@", array2);  
        NSLog(@"array3 :%@", array3);  
          
        //实例方法创建数组  
        NSArray *array4 = [[NSArray alloc] initWithObjects:@"AAA", @"bbb", nil];  
        NSLog(@"array4 :%@", array4);  
          
        //数组个数  
        NSLog(@"array3 count :%d", [array3 count]);  
          
        //访问元素  
        NSLog(@"obj at index :%@", [array2 objectAtIndex:2]);  
          
        //追加(返回新的array对象)  
        NSArray *array5 = [array3 arrayByAddingObject:@"ccc"];  
        NSLog(@"array5 :%@", array5);  
          
          
        //根据指定的字符串连接数组元素  
        NSString *joinString1 = [array5 componentsJoinedByString:@"|"];  
        NSLog(@"joinString :%@",joinString1);  
          
          
        //是否包含指定对象  
        NSLog(@"isContains :%d", [array5 containsObject:@"obj2"]);  
          
          
        //查找某个对象所在索引  
        NSLog(@"indexOfObject :%d",[array5 indexOfObject:@"obj3"]);  
          
        //最后一个元素  
        NSLog(@"lastObejct :%@", [array5 lastObject]);  
          
        //遍历数组  
        for (id element in array5) {  
            NSLog(@"element :%@", element);  
        }  
          
          
          
          
        //可变数组(期望容量设置为3)  
        NSMutableArray *mutableArray = [NSMutableArray arrayWithCapacity:3];  
        //直接添加  
        [mutableArray addObject:@"aaa"];  
        [mutableArray addObject:@"eee"];  
        [mutableArray addObject:@"000"];  
        NSLog(@"addObject :%@", mutableArray);  
          
        //插入元素  
        [mutableArray insertObject:@"ccc" atIndex:0];  
        NSLog(@"insertObject :%@", mutableArray);  
          
        //移除指定元素  
        [mutableArray removeObject:@"ccc"];  
        NSLog(@"removeObject :%@", mutableArray);  
          
        //移除指定下标元素  
        [mutableArray removeObjectAtIndex:0];  
        NSLog(@"removeObjectAtIndex :%@", mutableArray);  
          
        //移除最后一个元素  
        [mutableArray removeLastObject];  
        NSLog(@"removeLastObject :%@", mutableArray);  
          
        //添加数组  
        [mutableArray addObjectsFromArray:array5];  
        NSLog(@"addObjectsFromArray :%@", mutableArray);  
          
          
        //移除指定数组中的内容  
        [mutableArray removeObjectsInArray:array2];  
        NSLog(@"removeObjectsInArray :%@", mutableArray);  
          
          
        //指定索引替换对象  
        [mutableArray replaceObjectAtIndex:0 withObject:@"==="];  
        NSLog(@"replaceObjectAtIndex :%@", mutableArray);  
          
          
          
          
        //删除全部对象  
        [mutableArray removeAllObjects];  
        NSLog(@"removeAllObjects :%@", mutableArray);