黑马程序员 Foundation框架之结构体

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#import <Foundation/Foundation.h>

int main()

{

/*

   1.NSRange/CGRange

   2.NSPoint/CGPoint

   3.NSSize/CGSize

   4.NSRect/CGRct

  */

// NSRange/CGRange(location,length)

 NSString *str = @"i love u";

// 查找"love"在字符串中的范围

 NSRange r = NSMakeRange(2,4);

 NSRange range = [NSString rangeOfString:@"love"];

 NSLog(@"location = %ld, length = %ld", range.location, range.length);

 // CGPoint代表一个点

 // p代表的点与p1代表的点相同

 NSPoint p = NSMakePoint(50,100);

 CGPoint p1 = CGPointMake(50,100); // 常用

 // s代表的长宽与s1代表的长宽相同

 NSSize s = NSMakeSize(20,50);

 CGSize s1 = CGSizeMake(20,50);

 // r代表的形状与r1代表的形状相同

 NSRize r = NSMakeRize(0,0,20,50);

 CGRize r1 = CGRizeMake(0,0,20,50);

 CGRize r1 = CGRizeMake(CGPointMake(0,0),CGSizeMake(20,50));

 CGRize r1 = CGRizeMake(CGPointZero,CGSizeMake(20,50));

 return 0;

}