iOS复习笔记13:常用结构体

标签：ios   数据结构   

typedef struct _NSRange{
NSUInteger location;
NSUInteger length;
}NSRange;

NSString* str = @"I love OC";


// NSRange* rg = {2, 4};
// NSRange* rg = {.location = 2, .length = 4};
NSRange* rg = NSMakeRange(2, 4);
NSRange* r = [str rangOfString:@"love"];// "love"字符，从2开始，长度为4
NSRange p0 = NSRangeZero;// 判断是否相等，返回bool值

CGFloat即double
typedef _NSPoint{
CGFloat x;
CGFloat y;
}NSPoint;
typedef NSPoint CGPoint;

// CGPoint p = CGMakePoint(10, 10);
CGPoint p = CGPointMake(10, 10);
NSLog(@"%@", NSStringFromPoint(p));
CGPoint p0 = CGPointZero;
CGPointEqualToPoint(p, p0);// 判断是否相等，返回bool值

typedef struct _NSSize{
CGFloat x;
CGFloat y;
}NSSize;
typedef NSSize CGSize;

CGSize sz = CGSizeMake(10, 10);
NSLog(@"%@", NSStringFromSize(sz));
CGSize sz0 = CGSizeZero;
CGSizeEqualToSize(sz, sz0);// 判断是否相等，返回bool值

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

CGRect r = CGRectMake(0, 0, 100, 50);
NSLog(@"%@", NSStringFromRect(r));
CGRect r0 = CGRectZero;
CGRectEqualToRect(r, r0);// 判断是否相等，返回bool值
CGRectContainsPoint(r, p);// 判断矩形是否包含点，返回bool值

iOS复习笔记13:常用结构体

标签：ios   数据结构   

原文地址：http://blog.csdn.net/xufeng0991/article/details/43387197