Object-c基础编程学习笔记-Foundation

Cocoa为我们准备的结构体

1、NSRange

typedef struct _NSRange
{
    unsigned int location;
    unsigned int length;
}NSRange;

为NSRange赋值

1）

NSRange range;
range.location = 17;
range.length = 4;

2)

NSRange range = {17,4};

3)

NSRange range = NSMakeRange(17,4);

2、NSPoint、NSSize

typedef _NSPoint
{
    float x;
    float y;
}NSPoint;

typedef struct _NSSize
{
    float width;
    float height;
}NSSize;

3、NSRect

typedef struct _NSRect
{
    NSPoint origin;
    NSSize size;
}NSRect;