UIView+PYJExtension.h:
//
// UIView+PYJExtension.h
// 扩展
//
// Created by 彭运京 on 16/6/21.
// Copyright © 2016年 PYJ. All rights reserved.
// #import <UIKit/UIKit.h> CGPoint CGRectGetCenter(CGRect rect);
CGRect CGRectMoveToCenter(CGRect rect, CGPoint center); @interface UIView (PYJExtension) @property CGPoint origin;
@property CGSize size; @property (readonly) CGPoint bottomLeft;
@property (readonly) CGPoint bottomRight;
@property (readonly) CGPoint topRight; /// 高
@property CGFloat height;
/// 宽
@property CGFloat width;
/// Y坐标
@property CGFloat top;
/// X坐标
@property CGFloat left;
/// 底部 Y坐标+高度
@property CGFloat bottom;
/// 右侧 X坐标+宽度
@property CGFloat right; - (void) moveBy: (CGPoint) delta;
- (void) scaleBy: (CGFloat) scaleFactor;
- (void) fitInSize: (CGSize) aSize; /**
* 判断一个控件是否真正显示在主窗口
*/
- (BOOL)isShowingOnKeyWindow; //- (CGFloat)x;
//- (void)setX:(CGFloat)x;
/** 在分类中声明@property, 只会生成方法的声明, 不会生成方法的实现和带有_下划线的成员变量*/ + (instancetype)viewFromXib; @end
UIView+PYJExtension.m:
//
// UIView+PYJExtension.m
// 扩展
//
// Created by 彭运京 on 16/6/21.
// Copyright © 2016年 PYJ. All rights reserved.
// #import "UIView+PYJExtension.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 (PYJExtension) // 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;
} - (BOOL)isShowingOnKeyWindow
{
// 主窗口
UIWindow *keyWindow = [UIApplication sharedApplication].keyWindow; // 以主窗口左上角为坐标原点, 计算self的矩形框
CGRect newFrame = [keyWindow convertRect:self.frame fromView:self.superview];
CGRect winBounds = keyWindow.bounds; // 主窗口的bounds 和 self的矩形框 是否有重叠
BOOL intersects = CGRectIntersectsRect(newFrame, winBounds); return !self.isHidden && self.alpha > 0.01 && self.window == keyWindow && intersects;
} + (instancetype)viewFromXib
{
return [[[NSBundle mainBundle] loadNibNamed:NSStringFromClass(self) owner:nil options:nil] lastObject]; } @end