#import <Foundation/Foundation.h>  void test(){     //定义一种结构体     struct Date{         int Year;         int Month;         int Day;     };     struct Date d={2013,5,4};     d.Day=5; }  void test1(){     //宏定义     typedef struct Date{         int Year;         int Month;         int Day;     } MyDate;      MyDate day={2013,1,1};      }   void NSRangeTest(){     //NSRange是一个结构体，里面有两个成员，一个位置还有一个表示长度     NSRange range={3,1};     NSRange range1=NSMakeRange(6, 3);     NSLog(@"location:%zi",range1.location);  //NSRange参数类型是NSUInteger 就是Unsigned long类型 访问的话为@zi      NSLog(@"length:%zi",range1.length);      //还有一种NSString打印方法     NSString *str=NSStringFromRange(range);     NSLog(@"range:%@",str); }  void pointTest(){     NSPoint point={10,10};     point=NSMakePoint(11, 11);     point=CGPointMake(12, 12);//最常用     CGPoint point1;  //NSPoint和CGPoint是等价的     point1.x=11;     point1.y=12;     NSString *str=NSStringFromPoint(point);     NSLog(@"%@",str);     NSString *str1=NSStringFromPoint(point1);     NSLog(@"point:%@",str1); }  void sizeTest(){     //创建一个宽度为10，高度是8的size     NSSize size=CGSizeMake(10, 8);     size=NSMakeSize(11, 9);     size.width=12;     size.height=10;     NSString *str=NSStringFromSize(size);     NSLog(@"size:%@",str); }  void rectTest(){     //创建一个左边为多少的长方体     CGRect rect1=CGRectMake(1, 1, 10, 10);     NSRect rect=CGRectMake(10, 10, 12, 9);     rect.origin.x=11;     rect.origin.y=11;     rect.size.width=100;     rect.size.height=90;     NSString *str=NSStringFromRect(rect);     NSLog(@"rect:%@",str);     NSString *str1=NSStringFromRect(rect1);     NSLog(@"rect:%@",str1); } int main(int argc, const char * argv[]) {      @autoreleasepool {         NSRangeTest();         pointTest();         sizeTest();         rectTest();     }     return 0; }

结果：

2013-08-02 15:39:55.662 Foundation1-结构体[1267:303] location:6

2013-08-02 15:39:55.678 Foundation1-结构体[1267:303] length:3

2013-08-02 15:39:55.679 Foundation1-结构体[1267:303] range:{3, 1}

2013-08-02 15:39:55.679 Foundation1-结构体[1267:303] {12, 12}

2013-08-02 15:39:55.679 Foundation1-结构体[1267:303] point:{11, 12}

2013-08-02 15:39:55.680 Foundation1-结构体[1267:303] size:{12, 10}

2013-08-02 15:39:55.680 Foundation1-结构体[1267:303] rect:{{11, 11}, {100, 90}}

2013-08-02 15:39:55.680 Foundation1-结构体[1267:303] rect:{{1, 1}, {10, 10}}