Structures commonly used in objective-C: nsange, nspoint, nssize (cgsize), nsrect

Structures commonly used in objective-C: nsange, nspoint, nssize (cgsize), nsrect

1 nsange

The prototype of nsange is

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

Nsmakerange Functions

Ns_inlinez is the inline function typedef nsange * nsangepointer; ns_inline nsange nsmakerange (nsuinteger Loc, nsuinteger Len) {nsange R; R. Location = LOC; R. Length = Len; return r ;}

Usage

// The Value of "nsange range" indicates the range of "nsange range" and "range. location = 18; range. length = 34; nslog (@ "location is % zi", range. location); nslog (@ "length is % zi", range. length); // quickly create range = nsmakerange (8, 10); nslog (@ "location is % zi", range. location); nslog (@ "length is % zi", range. length); // nsstringfromrange converts the above struct to the string type and prints the nsstring * str1 = nsstringfromrange (range); // % @ is an OC object, range represents a struct, and STR is an OC object nslog (@ "Rang is % @", str1 );

2 nspoint

Nspoint prototype

struct CGPoint {     CGFloat x;     CGFloat y;     };

Nsmakepoint Function

NS_INLINE NSPoint NSMakePoint(CGFloat x, CGFloat y) {     NSPoint p;     p.x = x;     p.y = y;     return p;     }

Cgpointmake Function

CGPointMake(CGFloat x, CGFloat y)     {     CGPoint p; p.x = x; p.y = y; return p;     }

Usage

// Nspoint indicates the position nspoint point; // assign a value to the point in the struct. X = 10; point. y = 10; // quickly create a vertex point = nsmakepoint (10, 18); // a common function is cgpointmake's Function Point = cgpointmake (29, 78 ); nsstring * str2 = nsstringfrompoint (point); nslog (@ "point is % @", str2 );

3 cgsize

Cgsize prototype

struct CGSize {     CGFloat width;     CGFloat height;     };

Nsmakesize Function

NS_INLINE NSSize NSMakeSize(CGFloat w, CGFloat h) {     NSSize s;     s.width = w;     s.height = h;     return s;     }

Cgsizemake Function

CGSizeMake(CGFloat width, CGFloat height)     {     CGSize size; size.width = width; size.height = height; return size;     }

Usage

 NSSize size;       size.width = 100;    size.height = 12;    size = NSMakeSize(12, 12);    size = CGSizeMake(11, 11);        NSString* str3 = NSStringFromSize(size);    NSLog(@"%@",str3);

4 cgrect

Cgrect prototype

struct CGRect {     CGPoint origin;     CGSize size;     };

Cgrectmake Function

CGRectMake(CGFloat x, CGFloat y, CGFloat width, CGFloat height)     {     CGRect rect;     rect.origin.x = x; rect.origin.y = y;     rect.size.width = width; rect.size.height = height;     return rect;     }

Nsmakerect Function

NS_INLINE NSRect NSMakeRect(CGFloat x, CGFloat y, CGFloat w, CGFloat h) {     NSRect r;     r.origin.x = x;     r.origin.y = y;     r.size.width = w;     r.size.height = h;     return r;     }

Usage

// Contains both the size and position of nsrect rect; rect. origin. X = 12; rect. origin. y = 14; rect. size. width = 12; rect. size. height = 15; // quick creation method rect = cgrectmake (12, 12, 12, 12); rect = nsmakerect (11, 11, 11, 11 ); // print nsstring * str5 = nsstringfromrect (rect); nslog (@ "rect is % @", str5 );