Shapes-Procedural

最新推荐文章于 2025-11-10 16:25:08 发布

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本文介绍了一个简单的形状绘制程序，使用Objective-C编写。程序定义了不同类型的形状及其颜色，并通过一系列函数来绘制圆形、矩形、椭球及三角形。示例展示了如何创建多个形状并调用函数来绘制它们。

新建一个工程名为“Shapes-Procedural2”，为上篇代码增加描述三角形。修改代码如下：

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

#import <Foundation/Foundation.h>

typedef enum {
    kCircle,
    kRectangle,
    kOblateSpheroid,
    kTriangle
} ShapeType;

typedef enum{
    kRedColor,
    KGreenColor,
    kBlueColor
} ShapeColor;

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

typedef struct {
    ShapeType type;
    ShapeColor fillColor;
    ShapeRect bounds;
}Shape;

NSString *colorName(ShapeColor colorName)
{
    switch (colorName) {
        case kRedColor:
                return @"red";
            break;
        case KGreenColor:
            return @"green";
            break;
        case kBlueColor:
            return @"blue";
            break;
        default:
            return @"no clue";
            break;
    }
}
void drawCircle(ShapeRect bounds,
                ShapeColor fillColor)
{
    NSLog(@"drawing a circle at(%d %d %d %d)in %@",
          bounds.x,bounds.y,
          bounds.width,bounds.height,
          colorName(fillColor));
}

void drawTriangle(ShapeRect bounds,ShapeColor fillColor)
{
    NSLog(@"drawing a triangle at(%d %d %d %d)in %@",
          bounds.x,bounds.y,
          bounds.width,bounds.height,
          colorName(fillColor));
}

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

void drawEgg(ShapeRect bounds,
                   ShapeColor fillColor)
{
    NSLog(@"drawing a egg at(%d %d %d %d)in %@",
          bounds.x,bounds.y,
          bounds.width,bounds.height,
          colorName(fillColor));
}

void drawShapes(Shape shapes[],int count)
{
    int i;
    for(i=0;i<count;i++)
    {
        switch (shapes[i].type) {
            case kCircle:
                drawCircle(shapes[i].bounds, shapes[i].fillColor);
                break;
            case kRectangle:
                drawRectangle(shapes[i].bounds, shapes[i].fillColor);
                break;
            case kOblateSpheroid:
                drawEgg(shapes[i].bounds, shapes[i].fillColor);
                break;
            case kTriangle:
                drawTriangle(shapes[i].bounds, shapes[i].fillColor);

	     break;
            default:
                break;
        }
    
    }
}

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

    @autoreleasepool {
        
        // insert code here...
        Shape shapes[4];
        ShapeRect rect0={0,0,10,30};
        shapes[0].type=kCircle;
        shapes[0].fillColor=kRedColor;
        shapes[0].bounds=rect0;
        
        ShapeRect rect1={30,40,50,60};
        shapes[1].type=kRectangle;
        shapes[1].fillColor=KGreenColor;
        shapes[1].bounds=rect1;
        
        ShapeRect rect2={15,18,37,29};
        shapes[2].type=kOblateSpheroid;
        shapes[2].fillColor=kBlueColor;
        shapes[2].bounds=rect2;
        
        ShapeRect rect3={47,32,80,50};
        shapes[3].type=kTriangle;
        shapes[3].fillColor=kRedColor;
        shapes[3].bounds=rect3;

        
        drawShapes(shapes,4);
        
    }
    return 0;
}

运行结果如下：