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maojj/UIView+Utils.h

Created August 10, 2014 15:27
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UIView Utils Borrowed from Three20 / DTFoundation
Raw
UIView+Utils.h
//
// UIView+Utils.h
// Borrowed from Three20 / DTFoundation
//
// Copyright (c) 2013 iOS. No rights reserved.
//
#import <UIKit/UIKit.h>
@interface UIView (Utils)
/**
* Shortcut for frame.origin.x.
*
* Sets frame.origin.x = left
*/
@property (nonatomic) CGFloat left;
/**
* Shortcut for frame.origin.y
*
* Sets frame.origin.y = top
*/
@property (nonatomic) CGFloat top;
/**
* Shortcut for frame.origin.x + frame.size.width
*
* Sets frame.origin.x = right - frame.size.width
*/
@property (nonatomic) CGFloat right;
/**
* Shortcut for frame.origin.y + frame.size.height
*
* Sets frame.origin.y = bottom - frame.size.height
*/
@property (nonatomic) CGFloat bottom;
/**
* Shortcut for frame.size.width
*
* Sets frame.size.width = width
*/
@property (nonatomic) CGFloat width;
/**
* Shortcut for frame.size.height
*
* Sets frame.size.height = height
*/
@property (nonatomic) CGFloat height;
/**
* Shortcut for center.x
*
* Sets center.x = centerX
*/
@property (nonatomic) CGFloat centerX;
/**
* Shortcut for center.y
*
* Sets center.y = centerY
*/
@property (nonatomic) CGFloat centerY;
/**
* Return the x coordinate on the screen.
*/
@property (nonatomic, readonly) CGFloat screenX;
/**
* Return the y coordinate on the screen.
*/
@property (nonatomic, readonly) CGFloat screenY;
/**
* Return the x coordinate on the screen, taking into account scroll views.
*/
@property (nonatomic, readonly) CGFloat screenViewX;
/**
* Return the y coordinate on the screen, taking into account scroll views.
*/
@property (nonatomic, readonly) CGFloat screenViewY;
/**
* Return the view frame on the screen, taking into account scroll views.
*/
@property (nonatomic, readonly) CGRect screenFrame;
/**
* Shortcut for frame.origin
*/
@property (nonatomic) CGPoint origin;
/**
* Shortcut for frame.size
*/
@property (nonatomic) CGSize size;
/**
* Return the width in portrait or the height in landscape.
*/
@property (nonatomic, readonly) CGFloat orientationWidth;
/**
* Return the height in portrait or the width in landscape.
*/
@property (nonatomic, readonly) CGFloat orientationHeight;
/**
* Finds the first descendant view (including this view) that is a member of a particular class.
*/
- (UIView*)descendantOrSelfWithClass:(Class)cls;
/**
* Finds the first ancestor view (including this view) that is a member of a particular class.
*/
- (UIView*)ancestorOrSelfWithClass:(Class)cls;
/**
* Removes all subviews.
*/
- (void)removeAllSubviews;
/**
Attaches the given block for a single tap action to the receiver.
@param block The block to execute.
*/
- (void)setTapActionWithBlock:(void (^)(void))block;
/**
Attaches the given block for a long press action to the receiver.
@param block The block to execute.
*/
- (void)setLongPressActionWithBlock:(void (^)(void))block;
@end
Raw
UIView+Utils.m
//
// UIView+Utils.m
// Borrowed from Three20
//
// Copyright (c) 2013 iOS. No rights reserved.
//
#import "UIView+Utils.h"
#import <objc/runtime.h>
static char kDTActionHandlerTapBlockKey;
static char kDTActionHandlerTapGestureKey;
static char kDTActionHandlerLongPressBlockKey;
static char kDTActionHandlerLongPressGestureKey;
@implementation UIView (Utils)
- (CGFloat)left {
return self.frame.origin.x;
}
- (void)setLeft:(CGFloat)x {
CGRect frame = self.frame;
frame.origin.x = x;
self.frame = frame;
}
- (CGFloat)top {
return self.frame.origin.y;
}
- (void)setTop:(CGFloat)y {
CGRect frame = self.frame;
frame.origin.y = y;
self.frame = frame;
}
- (CGFloat)right {
return self.frame.origin.x + self.frame.size.width;
}
- (void)setRight:(CGFloat)right {
CGRect frame = self.frame;
frame.origin.x = right - frame.size.width;
self.frame = frame;
}
- (CGFloat)bottom {
return self.frame.origin.y + self.frame.size.height;
}
- (void)setBottom:(CGFloat)bottom {
CGRect frame = self.frame;
frame.origin.y = bottom - frame.size.height;
self.frame = frame;
}
- (CGFloat)centerX {
return self.center.x;
}
- (void)setCenterX:(CGFloat)centerX {
self.center = CGPointMake(centerX, self.center.y);
}
- (CGFloat)centerY {
return self.center.y;
}
- (void)setCenterY:(CGFloat)centerY {
self.center = CGPointMake(self.center.x, centerY);
}
- (CGFloat)width {
return self.frame.size.width;
}
- (void)setWidth:(CGFloat)width {
CGRect frame = self.frame;
frame.size.width = width;
self.frame = frame;
}
- (CGFloat)height {
return self.frame.size.height;
}
- (void)setHeight:(CGFloat)height {
CGRect frame = self.frame;
frame.size.height = height;
self.frame = frame;
}
- (CGFloat)screenX {
CGFloat x = 0.0f;
for (UIView* view = self; view; view = view.superview) {
x += view.left;
}
return x;
}
- (CGFloat)screenY {
CGFloat y = 0.0f;
for (UIView* view = self; view; view = view.superview) {
y += view.top;
}
return y;
}
- (CGFloat)screenViewX {
CGFloat x = 0.0f;
for (UIView* view = self; view; view = view.superview) {
x += view.left;
if ([view isKindOfClass:[UIScrollView class]]) {
UIScrollView* scrollView = (UIScrollView*)view;
x -= scrollView.contentOffset.x;
}
}
return x;
}
- (CGFloat)screenViewY {
CGFloat y = 0;
for (UIView* view = self; view; view = view.superview) {
y += view.top;
if ([view isKindOfClass:[UIScrollView class]]) {
UIScrollView* scrollView = (UIScrollView*)view;
y -= scrollView.contentOffset.y;
}
}
return y;
}
- (CGRect)screenFrame {
return CGRectMake(self.screenViewX, self.screenViewY, self.width, self.height);
}
- (CGPoint)origin {
return self.frame.origin;
}
- (void)setOrigin:(CGPoint)origin {
CGRect frame = self.frame;
frame.origin = origin;
self.frame = frame;
}
- (CGSize)size {
return self.frame.size;
}
- (void)setSize:(CGSize)size {
CGRect frame = self.frame;
frame.size = size;
self.frame = frame;
}
- (CGFloat)orientationWidth {
return UIInterfaceOrientationIsLandscape([UIApplication sharedApplication].statusBarOrientation)
? self.height : self.width;
}
- (CGFloat)orientationHeight {
return UIInterfaceOrientationIsLandscape([UIApplication sharedApplication].statusBarOrientation)
? self.width : self.height;
}
- (UIView*)descendantOrSelfWithClass:(Class)cls {
if ([self isKindOfClass:cls])
return self;
for (UIView* child in self.subviews) {
UIView* it = [child descendantOrSelfWithClass:cls];
if (it)
return it;
}
return nil;
}
- (UIView*)ancestorOrSelfWithClass:(Class)cls {
if ([self isKindOfClass:cls]) {
return self;
} else if (self.superview) {
return [self.superview ancestorOrSelfWithClass:cls];
} else {
return nil;
}
}
- (void)removeAllSubviews {
while (self.subviews.count) {
UIView* child = self.subviews.lastObject;
[child removeFromSuperview];
}
}
- (CGPoint)offsetFromView:(UIView*)otherView {
CGFloat x = 0.0f, y = 0.0f;
for (UIView* view = self; view && view != otherView; view = view.superview) {
x += view.left;
y += view.top;
}
return CGPointMake(x, y);
}
- (void)setTapActionWithBlock:(void (^)(void))block
{
UITapGestureRecognizer *gesture = objc_getAssociatedObject(self, &kDTActionHandlerTapGestureKey);
if (!gesture)
{
gesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(__handleActionForTapGesture:)];
[self addGestureRecognizer:gesture];
objc_setAssociatedObject(self, &kDTActionHandlerTapGestureKey, gesture, OBJC_ASSOCIATION_RETAIN);
}
objc_setAssociatedObject(self, &kDTActionHandlerTapBlockKey, block, OBJC_ASSOCIATION_COPY);
}
- (void)__handleActionForTapGesture:(UITapGestureRecognizer *)gesture
{
if (gesture.state == UIGestureRecognizerStateRecognized)
{
void(^action)(void) = objc_getAssociatedObject(self, &kDTActionHandlerTapBlockKey);
if (action)
{
action();
}
}
}
- (void)setLongPressActionWithBlock:(void (^)(void))block
{
UILongPressGestureRecognizer *gesture = objc_getAssociatedObject(self, &kDTActionHandlerLongPressGestureKey);
if (!gesture)
{
gesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(__handleActionForLongPressGesture:)];
[self addGestureRecognizer:gesture];
objc_setAssociatedObject(self, &kDTActionHandlerLongPressGestureKey, gesture, OBJC_ASSOCIATION_RETAIN);
}
objc_setAssociatedObject(self, &kDTActionHandlerLongPressBlockKey, block, OBJC_ASSOCIATION_COPY);
}
- (void)__handleActionForLongPressGesture:(UITapGestureRecognizer *)gesture
{
if (gesture.state == UIGestureRecognizerStateBegan)
{
void(^action)(void) = objc_getAssociatedObject(self, &kDTActionHandlerLongPressBlockKey);
if (action)
{
action();
}
}
}
@end
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