常用结构体

1.NSRange 

 1 typedef struct _NSRange { 2 NSUInteger location; 3 NSUInteger length; 4 } NSRange; 

location 位置 

length 长度

2.NSPoint / CGPoint

1 struct CGPoint {
2     CGFloat x;
3     CGFloat y;
4 };
5 typedef struct CGPoint CGPoint;
6
7 typedef CGPoint NSPoint;

x,y为坐标

3.NSSize / CGSize 

1 struct CGSize {
2     CGFloat width;
3     CGFloat height;
4 };
5 typedef struct CGSize CGSize;
6
7 typedef CGSize NSSize;

width 宽  height 高

4.NSRect / CGRect 矩形

1 struct CGRect {
2     CGPoint origin;
3     CGSize size;
4 };
5 typedef struct CGRect CGRect;
6
7 typedef CGRect NSRect;

origin 为CGPoint型的点 

size 为CGSize型的长度 

范例  

 1         // NeXTSTEP
 2         // CG 前缀 CoreGraphics
 3         NSPoint point = {3,4};
 4         CGPoint point1 = CGPointMake(5, 6);
 5
 6         NSLog(@"%@",NSStringFromPoint(point));
 7
 8
 9         CGSize size1 = {3,4};
10         CGSize size2 = CGSizeMake(3, 4);
11
12         NSLog(@"%@",NSStringFromSize(size1));
13         // 矩形
14         CGRect rect = {point,size1};
15         NSLog(@"%@",NSStringFromRect(rect));