Shapes-Object

最新推荐文章于 2024-09-27 09:41:51 发布

原创最新推荐文章于 2024-09-27 09:41:51 发布 · 2.2k 阅读

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本文介绍了一个使用Objective-C创建不同形状并绘制它们的例子。通过定义圆形、矩形和椭球体类，演示了如何设置颜色及边界，并利用数组进行绘制。

新建工程，名为：Shapes-Object，修改代码如下：

//
//  main.m
//  Shapes-Object
//
//  Created by cloud on 13-3-7.
//  Copyright (c) 2013年 cloud. All rights reserved.
//

#import <Foundation/Foundation.h>

typedef enum {
    kRedColor,
    kGreenColor,
    kBlueColor
} ShapeColor;

typedef struct {
    int x,y,width,height;
} ShapeRect;

NSString *colorName(ShapeColor color)
{
    switch (color) {
        case kRedColor:
            return @"red";
            break;
        case kGreenColor:
            return @"green";
            break;
        case kBlueColor:
            return @"blue";
            break;
        default:
            return @"no clue";
            break;
    }
}

@interface Circle : NSObject
{
    ShapeColor fillColor;
    ShapeRect   bounds;
}

- (void) setFillColor:(ShapeColor) fillColor;
- (void) setBounds:(ShapeRect) bounds;
- (void) draw;

@end

@implementation Circle

-(void) setFillColor:(ShapeColor)c
{
    fillColor=c;
}

-(void) setBounds:(ShapeRect)b
{
    bounds=b;
}

-(void) draw
{
    NSLog(@"drawing a circle at(%d %d %d %d) in %@",bounds.x,bounds.y,bounds.width,bounds.height,colorName(fillColor));
}
@end


@interface Rectangle : NSObject
{
    ShapeColor fillColor;
    ShapeRect   bounds;
}

- (void) setFillColor:(ShapeColor) fillColor;
- (void) setBounds:(ShapeRect) bounds;
- (void) draw;

@end

@implementation Rectangle

-(void) setFillColor:(ShapeColor)c
{
    fillColor=c;
}

-(void) setBounds:(ShapeRect)b
{
    bounds=b;
}

-(void) draw
{
    NSLog(@"drawing a rectangle at(%d %d %d %d) in %@",bounds.x,bounds.y,bounds.width,bounds.height,colorName(fillColor));
}
@end

@interface OblateSphereoid : NSObject
{
    ShapeColor fillColor;
    ShapeRect   bounds;
}

- (void) setFillColor:(ShapeColor) fillColor;
- (void) setBounds:(ShapeRect) bounds;
- (void) draw;

@end

@implementation OblateSphereoid

-(void) setFillColor:(ShapeColor)c
{
    fillColor=c;
}

-(void) setBounds:(ShapeRect)b
{
    bounds=b;
}

-(void) draw
{
    NSLog(@"drawing an egg at(%d %d %d %d) in %@",bounds.x,bounds.y,bounds.width,bounds.height,colorName(fillColor));
}
@end

void drawShapes(id shapes[],int count)
{
    int i;
    for(i=0;i<count;i++)
    {
        id shape= shapes[i];
        [shape draw];
    }
}

int main(int argc, const char * argv[])
{

    //@autoreleasepool {
        
        id shapes[3];
        
        ShapeRect rect0={0,0,10,30};
        shapes[0]=[Circle new];    
        [shapes[0] setBounds:rect0];
        [shapes[0] setFillColor:kRedColor];
        
        ShapeRect rect1={30,40,50,60};
        shapes[1]=[Rectangle new];
        [shapes[1] setBounds:rect1];
        [shapes[1] setFillColor:kGreenColor];
        
        ShapeRect rect2={15,19,37,29};
        shapes[2]=[OblateSphereoid new];
        [shapes[2] setBounds:rect2];
        [shapes[2] setFillColor:kBlueColor];
        
        drawShapes(shapes, 3);
        
   // }
    return 0;
}

运行，结果如下：