09-26

  1 //
  2 //  main.m
  3 //  01-绘制几何体
  4 //
  5 //  Created by zhoujian on 15/9/26.
  6 //  Copyright © 2015年 zhoujian. All rights reserved.
  7 //
  8 
  9 #import <Foundation/Foundation.h>
 10 
 11 //通过枚举，指定绘制的几何体形状
 12 typedef enum {
 13     KCircle,
 14     KRectangle,
 15     KEgg
 16 }ShapeType;
 17 
 18 //通过枚举，指定绘制图形的颜色
 19 typedef enum {
 20     KRedColor,
 21     KGreenColor,
 22     KBlueColor
 23 }ShapeColor;
 24 //假设，先指定一个矩形的大小和位置
 25 typedef struct {
 26     int x,y,width,height;
 27 }ShapeRect;
 28 
 29 
 30 //把之前内容用一个结构体结合起来
 31 typedef struct {
 32     ShapeType type;
 33     ShapeColor fillColor;
 34     ShapeRect bounds;
 35 }Shape;
 36 
 37 NSString *colorName (ShapeColor colorName) {
 38     switch (colorName) {
 39         case KRedColor:
 40             return @"red";
 41             break;
 42         case KBlueColor:
 43             return @"blue";
 44             break;
 45         case KGreenColor:
 46             return @"green";
 47             break;
 48             
 49             
 50         default:
 51             break;
 52     }
 53     return @"no color";
 54 }
 55 
 56 
 57 //输出矩形信息及传递颜色
 58 void  drawCircle (ShapeRect bounds,ShapeColor fillColor) {
 59     NSLog(@"dawing a circle at (%d,%d,%d,%d) in %@",bounds.x,bounds.y,bounds.width,bounds.height,colorName(fillColor));
 60 }
 61 void  drawRectangle (ShapeRect bounds,ShapeColor fillColor) {
 62     NSLog(@"dawing a Rectangle at (%d,%d,%d,%d) in %@",bounds.x,bounds.y,bounds.width,bounds.height,colorName(fillColor));
 63 }
 64 void  drawEgg (ShapeRect bounds,ShapeColor fillColor) {
 65     NSLog(@"dawing a Egg at (%d,%d,%d,%d) in %@",bounds.x,bounds.y,bounds.width,bounds.height,colorName(fillColor));
 66 }
 67 //绘制图形
 68 void drawShapes (Shape shapes[],int count) {
 69     for (int i=0; i<count; i++) {
 70         switch (shapes[i].type) {
 71             case KCircle: {
 72                 drawCircle(shapes[i].bounds,shapes[i].fillColor);
 73             }
 74                 break;
 75             case KRectangle: {
 76                 drawRectangle(shapes[i].bounds,shapes[i].fillColor);
 77             }
 78                 break;
 79             case KEgg: {
 80                 drawEgg(shapes[i].bounds,shapes[i].fillColor);
 81                 break;
 82             }
 83             default:
 84                 break;
 85         }
 86     }
 87 }
 88 
 89 
 90 //主函数
 91 int main(int argc, const char * argv[]) {
 92     @autoreleasepool {
 93         
 94         //对结构体分配空间，进行初始化
 95         Shape shapes[3];
 96         
 97         //红色圆形
 98         ShapeRect rect0 = {0,0,10,30};
 99         shapes[0].type = KCircle;
100         shapes[0].fillColor = KRedColor;
101         shapes[0].bounds = rect0;
102         
103         //绿色矩形
104         ShapeRect rect1 = {10,10,10,30};
105         shapes[1].type = KRectangle;
106         shapes[1].fillColor = KGreenColor;
107         shapes[1].bounds = rect1;
108         
109         //红色圆形
110         ShapeRect rect2 = {30,30,10,30};
111         shapes[2].type = KEgg;
112         shapes[2].fillColor = KBlueColor;
113         shapes[2].bounds = rect2;
114         
115         drawShapes(shapes,3);
116         
117         
118     }
119     return 0;
120 }