1、CHSwitch.h

  1. //
  2. // 文 件 名:CHSwitch.h
  3. //
  4. // 版权所有:Copyright © 2018 lelight. All rights reserved.
  5. // 创 建 者:lelight
  6. // 创建日期:2018/12/19.
  7. // 文档说明:
  8. // 修 改 人:
  9. // 修改日期:
  10. //
  12. #import <UIKit/UIKit.h>
  14. NS_ASSUME_NONNULL_BEGIN
  16. typedef enum {
  17.     CHSwitchShapeOval,
  18.     CHSwitchShapeRectangle,
  19.     CHSwitchShapeRectangleNoCorner
  20. } CHSwitchShape;
  22. @interface CHSwitch : UIControl <UIGestureRecognizerDelegate>
  24. /** 开关状态读取与设置 */
  25. @property (nonatomic, getter = isOn) BOOL on;
  26. /** 开关形状枚举值：默认CHSwitchShapeOval */
  27. @property (nonatomic, assign) CHSwitchShape shape;
  28. /** 打开时的颜色 */
  29. @property (nonatomic, strong) UIColor *onTintColor;
  30. /** 关闭时的颜色 */
  31. @property (nonatomic, strong) UIColor *tintColor;
  32. /** 圆点颜色 */
  33. @property (nonatomic, strong) UIColor *thumbTintColor;
  34. /** 是否需要阴影效果 */
  35. @property (nonatomic, assign) BOOL shadow;
  36. /** 关闭时的阴影颜色 */
  37. @property (nonatomic, strong) UIColor *tintBorderColor;
  38. /** 打开时的阴影颜色 */
  39. @property (nonatomic, strong) UIColor *onTintBorderColor;
  41. @end
  43. NS_ASSUME_NONNULL_END

2、CHSwitch.m

  1. //
  2. // 文 件 名:CHSwitch.m
  3. //
  4. // 版权所有:Copyright © 2018 lelight. All rights reserved.
  5. // 创 建 者:lelight
  6. // 创建日期:2018/12/19.
  7. // 文档说明:
  8. // 修 改 人:
  9. // 修改日期:
  10. //
  12. #import "CHSwitch.h"
  13. #import <QuartzCore/QuartzCore.h>
  15. static const CGFloat kAnimateDuration = 0.3f;
  16. static const CGFloat kHorizontalAdjustment = 3.0f;
  17. static const CGFloat kRectShapeCornerRadius = 4.0f;
  18. static const CGFloat kThumbShadowOpacity = 0.3f;
  19. static const CGFloat kThumbShadowRadius = 0.5f;
  20. static const CGFloat kSwitchBorderWidth = 1.75f;
  22. @interface CHSwitch ()
  24. @property (nonatomic, strong) UIView *onBackgroundView;
  25. @property (nonatomic, strong) UIView *offBackgroundView;
  26. @property (nonatomic, strong) UIView *thumbView;
  28. @end
  30. @implementation CHSwitch
  32. @synthesize onBackgroundView = _onBackgroundView;
  33. @synthesize offBackgroundView = _offBackgroundView;
  34. @synthesize thumbView = _thumbView;
  35. @synthesize on = _on;
  36. @synthesize shape = _shape;
  37. @synthesize onTintColor = _onTintColor;
  38. @synthesize tintColor = _tintColor;
  39. @synthesize thumbTintColor = _thumbTintColor;
  40. @synthesize shadow = _shadow;
  41. @synthesize onTintBorderColor = _onTintBorderColor;
  42. @synthesize tintBorderColor = _tintBorderColor;
  44. #pragma mark - View
  45. - (id)initWithFrame:(CGRect)frame {
  46.     self = [super initWithFrame:frame];
  47.     if (self) {
  48.         [self setupUI];
  49.     }
  50.     return self;
  51. }
  53. - (void) awakeFromNib {
  54.     [super awakeFromNib];
  56.     [self setupUI];
  57. }
  59. - (void)setupUI {
  60.     self.shape = CHSwitchShapeOval;
  62.     [self setBackgroundColor:[UIColor clearColor]];
  64.     // Background view for ON
  65.     self.onBackgroundView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];
  66.     [self.onBackgroundView setBackgroundColor:[UIColor colorWithRed:(19.0f/255.0f) green:(121.0f/255.0f) blue:(208.0f/255.0f) alpha:1.0f]];
  67.     [self.onBackgroundView.layer setCornerRadius:self.frame.size.height/2];
  68.     [self.onBackgroundView.layer setShouldRasterize:YES];
  69.     [self.onBackgroundView.layer setRasterizationScale:[UIScreen mainScreen].scale];
  70.     [self addSubview:self.onBackgroundView];
  72.     // Background view for OFF
  73.     self.offBackgroundView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];
  74.     [self.offBackgroundView setBackgroundColor:[UIColor whiteColor]];
  75.     [self.offBackgroundView.layer setCornerRadius:self.frame.size.height/2];
  76.     [self.offBackgroundView.layer setShouldRasterize:YES];
  77.     [self.offBackgroundView.layer setRasterizationScale:[UIScreen mainScreen].scale];
  78.     [self addSubview:self.offBackgroundView];
  80.     // Round switch view
  81.     self.thumbView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.frame.size.height-kHorizontalAdjustment, self.frame.size.height-kHorizontalAdjustment)];
  82.     [self.thumbView setBackgroundColor:[UIColor whiteColor]];
  83.     [self.thumbView setUserInteractionEnabled:YES];
  84.     [self.thumbView.layer setCornerRadius:(self.frame.size.height-kHorizontalAdjustment)/2];
  85.     [self.thumbView.layer setShadowOffset:CGSizeMake(0, 1)];
  86.     [self.thumbView.layer setShouldRasterize:YES];
  87.     [self.thumbView.layer setShadowOpacity:kThumbShadowOpacity];
  88.     [self.thumbView.layer setRasterizationScale:[UIScreen mainScreen].scale];
  89.     [self addSubview:self.thumbView];
  90.     self.shadow = YES;
  92.     // Default to OFF position
  93.     [self.thumbView setCenter:CGPointMake(self.thumbView.frame.size.width/2, self.frame.size.height/2)];
  95.     // Handle Thumb Tap Gesture
  96.     UITapGestureRecognizer *tapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self
  97.            action:@selector(handleSwitchTap:)];
  98.     [tapGestureRecognizer setDelegate:self];
  99.     [self.thumbView addGestureRecognizer:tapGestureRecognizer];
  101.     // Handle Background Tap Gesture
  102.     UITapGestureRecognizer *tapBgGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleBgTap:)];
  103.     [tapBgGestureRecognizer setDelegate:self];
  104.     [self addGestureRecognizer:tapBgGestureRecognizer];
  106.     // Handle Thumb Pan Gesture
  107.     UIPanGestureRecognizer *panGestureRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handlePan:)];
  108.     [panGestureRecognizer setDelegate:self];
  109.     [self.thumbView addGestureRecognizer:panGestureRecognizer];
  111.     [self setOn:NO];
  112. }
  114. #pragma mark - Accessor
  115. - (BOOL)isOn {
  116.     return _on;
  117. }
  119. - (void)setOn:(BOOL)on {
  120.     if (_on != on)
  121.         _on = on;
  123.     if (_on) {
  124.         [self.onBackgroundView setAlpha:1.0];
  125.         self.offBackgroundView.transform = CGAffineTransformMakeScale(0.0, 0.0);
  127.         self.thumbView.center = CGPointMake(self.onBackgroundView.frame.size.width - (self.thumbView.frame.size.width + kHorizontalAdjustment)/2, self.thumbView.center.y);
  128.     }
  129.     else {
  130.         [self.onBackgroundView setAlpha:0.0];
  131.         self.offBackgroundView.transform = CGAffineTransformMakeScale(1.0, 1.0);
  133.         self.thumbView.center = CGPointMake((self.thumbView.frame.size.width+kHorizontalAdjustment)/2, self.thumbView.center.y);
  134.     }
  135. }
  137. - (void)setOnTintColor:(UIColor *)color
  138. {
  139.     if (_onTintColor != color)
  140.         _onTintColor = color;
  142.     [self.onBackgroundView setBackgroundColor:color];
  143. }
  145. - (void)setOnTintBorderColor:(UIColor *)color
  146. {
  147.     if (_onTintBorderColor != color)
  148.         _onTintBorderColor = color;
  150.     [self.onBackgroundView.layer setBorderColor:color.CGColor];
  152.     if (color)
  153.         [self.onBackgroundView.layer setBorderWidth:kSwitchBorderWidth];
  154.     else
  155.         [self.onBackgroundView.layer setBorderWidth:0.0];
  156. }
  158. - (void)setTintColor:(UIColor *)color
  159. {
  160.     if (_tintColor != color)
  161.         _tintColor = color;
  163.     [self.offBackgroundView setBackgroundColor:color];
  164. }
  166. - (void)setTintBorderColor:(UIColor *)color
  167. {
  168.     if (_tintBorderColor != color)
  169.         _tintBorderColor = color;
  171.     [self.offBackgroundView.layer setBorderColor:color.CGColor];
  173.     if (color)
  174.         [self.offBackgroundView.layer setBorderWidth:kSwitchBorderWidth];
  175.     else
  176.         [self.offBackgroundView.layer setBorderWidth:0.0];
  177. }
  179. - (void)setThumbTintColor:(UIColor *)color
  180. {
  181.     if (_thumbTintColor != color)
  182.         _thumbTintColor = color;
  184.     [self.thumbView setBackgroundColor:color];
  185. }
  187. - (void)setShape:(CHSwitchShape)newShape
  188. {
  189.     if (_shape != newShape)
  190.         _shape = newShape;
  192.     if (newShape == CHSwitchShapeOval)
  193.     {
  194.         [self.onBackgroundView.layer setCornerRadius:self.frame.size.height/2];
  195.         [self.offBackgroundView.layer setCornerRadius:self.frame.size.height/2];
  196.         [self.thumbView.layer setCornerRadius:(self.frame.size.height-kHorizontalAdjustment)/2];
  197.     }
  198.     else if (newShape == CHSwitchShapeRectangle)
  199.     {
  200.         [self.onBackgroundView.layer setCornerRadius:kRectShapeCornerRadius];
  201.         [self.offBackgroundView.layer setCornerRadius:kRectShapeCornerRadius];
  202.         [self.thumbView.layer setCornerRadius:kRectShapeCornerRadius];
  203.     }
  204.     else if (newShape == CHSwitchShapeRectangleNoCorner)
  205.     {
  206.         [self.onBackgroundView.layer setCornerRadius:0];
  207.         [self.offBackgroundView.layer setCornerRadius:0];
  208.         [self.thumbView.layer setCornerRadius:0];
  209.     }
  210. }
  212. - (void)setShadow:(BOOL)showShadow
  213. {
  214.     if (_shadow != showShadow)
  215.         _shadow = showShadow;
  217.     if (showShadow)
  218.     {
  219.         [self.thumbView.layer setShadowOffset:CGSizeMake(0, 1)];
  220.         [self.thumbView.layer setShadowRadius:kThumbShadowRadius];
  221.         [self.thumbView.layer setShadowOpacity:kThumbShadowOpacity];
  222.     }
  223.     else
  224.     {
  225.         [self.thumbView.layer setShadowRadius:0.0];
  226.         [self.thumbView.layer setShadowOpacity:0.0];
  227.     }
  228. }
  230. #pragma mark - Animation
  231. - (void)animateToDestination:(CGPoint)centerPoint withDuration:(CGFloat)duration switch:(BOOL)on
  232. {
  233.     [UIView animateWithDuration:duration
  234.                           delay:0.0f
  235.                         options:UIViewAnimationOptionCurveEaseOut
  236.                      animations:^{
  237.                          self.thumbView.center = centerPoint;
  239.                          if (on)
  240.                          {
  241.                              [self.onBackgroundView setAlpha:1.0];
  242.                          }
  243.                          else
  244.                          {
  245.                              [self.onBackgroundView setAlpha:0.0];
  246.                          }
  248.                      }
  249.                      completion:^(BOOL finished) {
  250.                          if (finished)
  251.                          {
  252.                              [self updateSwitch:on];
  253.                          }
  255.                      }];
  257.     [UIView animateWithDuration:duration
  258.                           delay:0.075f
  259.                         options:UIViewAnimationOptionCurveEaseOut
  260.                      animations:^{
  261.                          if (on)
  262.                          {
  263.                              self.offBackgroundView.transform = CGAffineTransformMakeScale(0.0, 0.0);
  264.                          }
  265.                          else
  266.                          {
  267.                              self.offBackgroundView.transform = CGAffineTransformMakeScale(1.0, 1.0);
  268.                          }
  270.                      }
  271.                      completion:^(BOOL finished) {
  272.                      }];
  273. }
  275. #pragma mark - Gesture Recognizers
  276. - (void)handlePan:(UIPanGestureRecognizer *)recognizer
  277. {
  278.     CGPoint translation = [recognizer translationInView:self.thumbView];
  280.     // Check the new center to see if within the boud
  281.     CGPoint newCenter = CGPointMake(recognizer.view.center.x + translation.x,
  282.                                     recognizer.view.center.y);
  283.     if (newCenter.x < (recognizer.view.frame.size.width+kHorizontalAdjustment)/2 || newCenter.x > self.onBackgroundView.frame.size.width-(recognizer.view.frame.size.width+kHorizontalAdjustment)/2)
  284.     {
  285.         // New center is Out of bound. Animate to left or right position
  286.         if(recognizer.state == UIGestureRecognizerStateBegan ||
  287.            recognizer.state == UIGestureRecognizerStateChanged)
  288.         {
  289.             CGPoint velocity = [recognizer velocityInView:self.thumbView];
  291.             if (velocity.x >= 0)
  292.             {
  293.                 // Animate move to right
  294.                 [self animateToDestination:CGPointMake(self.onBackgroundView.frame.size.width - (self.thumbView.frame.size.width+kHorizontalAdjustment)/2, recognizer.view.center.y) withDuration:kAnimateDuration switch:YES];
  295.             }
  296.             else
  297.             {
  298.                 // Animate move to left
  299.                 [self animateToDestination:CGPointMake((self.thumbView.frame.size.width+kHorizontalAdjustment)/2, recognizer.view.center.y) withDuration:kAnimateDuration switch:NO];
  300.             }
  302.         }
  304.         return;
  305.     }
  307.     // Only allow vertical pan
  308.     recognizer.view.center = CGPointMake(recognizer.view.center.x + translation.x,
  309.                                          recognizer.view.center.y);
  310.     [recognizer setTranslation:CGPointMake(0, 0) inView:self.thumbView];
  312.     CGPoint velocity = [recognizer velocityInView:self.thumbView];
  314.     if(recognizer.state == UIGestureRecognizerStateEnded)
  315.     {
  316.         if (velocity.x >= 0)
  317.         {
  318.             if (recognizer.view.center.x < self.onBackgroundView.frame.size.width - (self.thumbView.frame.size.width+kHorizontalAdjustment)/2)
  319.             {
  320.                 // Animate move to right
  321.                 [self animateToDestination:CGPointMake(self.onBackgroundView.frame.size.width - (self.thumbView.frame.size.width+kHorizontalAdjustment)/2, recognizer.view.center.y) withDuration:kAnimateDuration switch:YES];
  322.             }
  323.         }
  324.         else
  325.         {
  326.             // Animate move to left
  327.             [self animateToDestination:CGPointMake((self.thumbView.frame.size.width+kHorizontalAdjustment)/2, recognizer.view.center.y) withDuration:kAnimateDuration switch:NO];
  328.         }
  329.     }
  330. }
  332. - (void)handleSwitchTap:(UIPanGestureRecognizer *)recognizer
  333. {
  334.     if (recognizer.state == UIGestureRecognizerStateEnded)
  335.     {
  336.         if (self.isOn)
  337.         {
  338.             // Animate move to left
  339.             [self animateToDestination:CGPointMake((self.thumbView.frame.size.width+kHorizontalAdjustment)/2, recognizer.view.center.y) withDuration:kAnimateDuration switch:NO];
  340.         }
  341.         else
  342.         {
  343.             // Animate move to right
  344.             [self animateToDestination:CGPointMake(self.onBackgroundView.frame.size.width - (self.thumbView.frame.size.width+kHorizontalAdjustment)/2, recognizer.view.center.y) withDuration:kAnimateDuration switch:YES];
  345.         }
  346.     }
  347. }
  349. - (void)handleBgTap:(UIPanGestureRecognizer *)recognizer
  350. {
  351.     if (recognizer.state == UIGestureRecognizerStateEnded)
  352.     {
  353.         if (self.isOn)
  354.         {
  355.             // Animate move to left
  356.             [self animateToDestination:CGPointMake((self.thumbView.frame.size.width+kHorizontalAdjustment)/2, self.thumbView.center.y) withDuration:kAnimateDuration switch:NO];
  357.         }
  358.         else
  359.         {
  360.             // Animate move to right
  361.             [self animateToDestination:CGPointMake(self.onBackgroundView.frame.size.width - (self.thumbView.frame.size.width+kHorizontalAdjustment)/2, self.thumbView.center.y) withDuration:kAnimateDuration switch:YES];
  362.         }
  363.     }
  364. }
  366. #pragma mark -
  367. - (void)updateSwitch:(BOOL)on
  368. {
  369.     if (_on != on)
  370.         _on = on;
  372.     [self sendActionsForControlEvents:UIControlEventValueChanged];
  373. }
  375. @end

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