Initial commit

2017-08-15 16:59:01 +08:00
commit bdc83e07ef
5766 changed files with 423223 additions and 0 deletions
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+/*
+ Erica Sadun, http://ericasadun.com
+ iPhone Developer's Cookbook, 3.0 Edition
+ BSD License, Use at your own risk
+ */
+
+#import "UIViewExt.h"
+
+CGPoint CGRectGetCenter(CGRect rect)
+{
+    CGPoint pt;
+    pt.x = CGRectGetMidX(rect);
+    pt.y = CGRectGetMidY(rect);
+    return pt;
+}
+
+CGRect CGRectMoveToCenter(CGRect rect, CGPoint center)
+{
+    CGRect newrect = CGRectZero;
+    newrect.origin.x = center.x-CGRectGetMidX(rect);
+    newrect.origin.y = center.y-CGRectGetMidY(rect);
+    newrect.size = rect.size;
+    return newrect;
+}
+
+@implementation UIView (ViewGeometry)
+
+// Retrieve and set the origin
+- (CGPoint) origin
+{
+	return self.frame.origin;
+}
+
+- (void) setOrigin: (CGPoint) aPoint
+{
+	CGRect newframe = self.frame;
+	newframe.origin = aPoint;
+	self.frame = newframe;
+}
+
+
+// Retrieve and set the size
+- (CGSize) size
+{
+	return self.frame.size;
+}
+
+- (void) setSize: (CGSize) aSize
+{
+	CGRect newframe = self.frame;
+	newframe.size = aSize;
+	self.frame = newframe;
+}
+
+// Query other frame locations
+- (CGPoint) bottomRight
+{
+	CGFloat x = self.frame.origin.x + self.frame.size.width;
+	CGFloat y = self.frame.origin.y + self.frame.size.height;
+	return CGPointMake(x, y);
+}
+
+- (CGPoint) bottomLeft
+{
+	CGFloat x = self.frame.origin.x;
+	CGFloat y = self.frame.origin.y + self.frame.size.height;
+	return CGPointMake(x, y);
+}
+
+- (CGPoint) topRight
+{
+	CGFloat x = self.frame.origin.x + self.frame.size.width;
+	CGFloat y = self.frame.origin.y;
+	return CGPointMake(x, y);
+}
+
+
+// Retrieve and set height, width, top, bottom, left, right
+- (CGFloat) height
+{
+	return self.frame.size.height;
+}
+
+- (void) setHeight: (CGFloat) newheight
+{
+	CGRect newframe = self.frame;
+	newframe.size.height = newheight;
+	self.frame = newframe;
+}
+
+- (CGFloat) width
+{
+	return self.frame.size.width;
+}
+
+- (void) setWidth: (CGFloat) newwidth
+{
+	CGRect newframe = self.frame;
+	newframe.size.width = newwidth;
+	self.frame = newframe;
+}
+
+- (CGFloat) top
+{
+	return self.frame.origin.y;
+}
+
+- (void) setTop: (CGFloat) newtop
+{
+	CGRect newframe = self.frame;
+	newframe.origin.y = newtop;
+	self.frame = newframe;
+}
+
+- (CGFloat) left
+{
+	return self.frame.origin.x;
+}
+
+- (void) setLeft: (CGFloat) newleft
+{
+	CGRect newframe = self.frame;
+	newframe.origin.x = newleft;
+	self.frame = newframe;
+}
+
+- (CGFloat) bottom
+{
+	return self.frame.origin.y + self.frame.size.height;
+}
+
+- (void) setBottom: (CGFloat) newbottom
+{
+	CGRect newframe = self.frame;
+	newframe.origin.y = newbottom - self.frame.size.height;
+	self.frame = newframe;
+}
+
+- (CGFloat) right
+{
+	return self.frame.origin.x + self.frame.size.width;
+}
+
+- (void) setRight: (CGFloat) newright
+{
+	CGFloat delta = newright - (self.frame.origin.x + self.frame.size.width);
+	CGRect newframe = self.frame;
+	newframe.origin.x += delta ;
+	self.frame = newframe;
+}
+
+// Move via offset
+- (void) moveBy: (CGPoint) delta
+{
+	CGPoint newcenter = self.center;
+	newcenter.x += delta.x;
+	newcenter.y += delta.y;
+	self.center = newcenter;
+}
+
+// Scaling
+- (void) scaleBy: (CGFloat) scaleFactor
+{
+	CGRect newframe = self.frame;
+	newframe.size.width *= scaleFactor;
+	newframe.size.height *= scaleFactor;
+	self.frame = newframe;
+}
+
+// Ensure that both dimensions fit within the given size by scaling down
+- (void) fitInSize: (CGSize) aSize
+{
+	CGFloat scale;
+	CGRect newframe = self.frame;
+	
+	if (newframe.size.height && (newframe.size.height > aSize.height))
+	{
+		scale = aSize.height / newframe.size.height;
+		newframe.size.width *= scale;
+		newframe.size.height *= scale;
+	}
+	
+	if (newframe.size.width && (newframe.size.width >= aSize.width))
+	{
+		scale = aSize.width / newframe.size.width;
+		newframe.size.width *= scale;
+		newframe.size.height *= scale;
+	}
+	
+	self.frame = newframe;	
+}
+@end