UIView-draggable 可拖拽的UIView

UIView category that adds dragging capabilities

一个类目用来给UIView便利的添加拖拽手势

Setup with Cocoapods 用Cocoapods设置

• Add pod 'UIView+draggable' to your Podfile
• Run pod install
• Run open App.xcworkspace
• Import UIVIew+draggable.h in your controller's header file

Usage 使用

// Enable dragging[self.view enableDragging];

TODO

• Write the README :)

 

UIView+draggable.h

////  UIView+draggable.h//  UIView+draggable////  Created by Andrea on 13/03/14.//  Copyright (c) 2014 Fancy Pixel. All rights reserved.//@interface UIView (draggable)/**----------------------------------------------------------------------------- * @name UIView+draggable Properties * ----------------------------------------------------------------------------- *//** The pan gestures that handles the view dragging * * @param panGesture The tint color of the blurred view. Set to nil to reset. */@property (nonatomic) UIPanGestureRecognizer *panGesture;/**----------------------------------------------------------------------------- * @name UIView+draggable Methods * ----------------------------------------------------------------------------- *//** Enables the dragging * * Enables the dragging state of the view */- (void)enableDragging;/** Disable or enable the view dragging * * @param draggable The boolean that enables or disables the draggable state */- (void)setDraggable:(BOOL)draggable;@end

UIView+draggable.m

////  UIView+draggable.m//  UIView+draggable////  Created by Andrea on 13/03/14.//  Copyright (c) 2014 Fancy Pixel. All rights reserved.//#import "UIView+draggable.h"#import 
     
      @implementation UIView (draggable)- (void)setPanGesture:(UIPanGestureRecognizer*)panGesture{    objc_setAssociatedObject(self, @selector(panGesture), panGesture, OBJC_ASSOCIATION_RETAIN);}- (UIPanGestureRecognizer*)panGesture{    return objc_getAssociatedObject(self, @selector(panGesture));}- (void)handlePan:(UIPanGestureRecognizer*)sender{    [self adjustAnchorPointForGestureRecognizer:sender];    CGPoint translation = [sender translationInView:[self superview]];    [self setCenter:CGPointMake([self center].x + translation.x, [self center].y + translation.y)];    [sender setTranslation:(CGPoint){
    0, 0} inView:[self superview]];}- (void)adjustAnchorPointForGestureRecognizer:(UIGestureRecognizer *)gestureRecognizer{    if (gestureRecognizer.state == UIGestureRecognizerStateBegan) {        UIView *piece = self;        CGPoint locationInView = [gestureRecognizer locationInView:piece];        CGPoint locationInSuperview = [gestureRecognizer locationInView:piece.superview];                piece.layer.anchorPoint = CGPointMake(locationInView.x / piece.bounds.size.width, locationInView.y / piece.bounds.size.height);        piece.center = locationInSuperview;    }}- (void)setDraggable:(BOOL)draggable{    [self.panGesture setEnabled:draggable];}- (void)enableDragging{    self.panGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handlePan:)];    [self.panGesture setMaximumNumberOfTouches:1];    [self.panGesture setMinimumNumberOfTouches:1];    [self.panGesture setCancelsTouchesInView:NO];    [self addGestureRecognizer:self.panGesture];}@end