黑马程序员 Foundation框架之结构体

#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;

}