通过path绘制点击区域
效果
源码
https://github.com/YouXianMing/Animations
//
// TapDrawImageView.h
// TapDrawImageView
//
// Created by YouXianMing on 16/5/9.
// Copyright © 2016年 YouXianMing. All rights reserved.
// #import <UIKit/UIKit.h>
#import "TapDrawPathManager.h"
@class TapDrawImageView; static NSString *tapDrawImageViewNormalState = @"normalState";
static NSString *tapDrawImageViewHighlightState = @"highlightState";
static NSString *tapDrawImageDisableState = @"disableState"; @protocol TapDrawImageViewDelegate <NSObject> - (void)tapDrawImageView:(TapDrawImageView *)tapImageView selectedPathManager:(TapDrawPathManager *)pathManager; @end @interface TapDrawImageView : UIView @property (nonatomic, weak) id <TapDrawImageViewDelegate> delegate; @property (nonatomic, strong) NSMutableArray <TapDrawPathManager *> *pathManagers; @end
//
// TapDrawImageView.m
// TapDrawImageView
//
// Created by YouXianMing on 16/5/9.
// Copyright © 2016年 YouXianMing. All rights reserved.
// #import "TapDrawImageView.h" @interface TapDrawImageView () @property (nonatomic, strong) TapDrawPathManager *currentSelectedManager;
@property (nonatomic, strong) UIImageView *imageView; @end @implementation TapDrawImageView - (instancetype)initWithFrame:(CGRect)frame { if (self = [super initWithFrame:frame]) { self.pathManagers = [NSMutableArray array];
self.backgroundColor = [UIColor clearColor];
} return self;
} - (void)drawRect:(CGRect)rect { CGContextRef context = UIGraphicsGetCurrentContext(); [self.pathManagers enumerateObjectsUsingBlock:^(TapDrawPathManager *pathManager, NSUInteger idx, BOOL *stop) { TapDrawObject *drawObject = [pathManager.colorsType objectForKey:pathManager.currentDrawType]; // Set Fill Color.
{
CGFloat red = ;
CGFloat green = ;
CGFloat blue = ;
CGFloat alpha = ;
[drawObject.fillColor getRed:&red green:&green blue:&blue alpha:&alpha];
CGContextSetRGBFillColor(context, red, green, blue, alpha);
} // Set Stroke Color.
{
CGFloat red = ;
CGFloat green = ;
CGFloat blue = ;
CGFloat alpha = ;
[drawObject.strokeColor getRed:&red green:&green blue:&blue alpha:&alpha];
CGContextSetRGBStrokeColor(context, red, green, blue, alpha);
} pathManager.path.lineWidth = drawObject.lineWidth;
[pathManager.path fill];
[pathManager.path stroke];
}];
} - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [touches anyObject];
CGPoint touchPoint = [touch locationInView:self]; [self.pathManagers enumerateObjectsUsingBlock:^(TapDrawPathManager *pathManager, NSUInteger idx, BOOL *stop) { if ([pathManager.path containsPoint:touchPoint]) { if (self.delegate && [self.delegate respondsToSelector:@selector(tapDrawImageView:selectedPathManager:)]) { [self.delegate tapDrawImageView:self selectedPathManager:pathManager];
} if ([pathManager.currentDrawType isEqualToString:tapDrawImageDisableState] == NO) { pathManager.currentDrawType = tapDrawImageViewHighlightState;
_currentSelectedManager = pathManager;
[self setNeedsDisplay];
} *stop = YES;
}
}];
} - (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(nullable UIEvent *)event { if (_currentSelectedManager) { _currentSelectedManager.currentDrawType = tapDrawImageViewNormalState;
[self setNeedsDisplay];
}
_currentSelectedManager = nil;
} - (void)touchesCancelled:(nullable NSSet<UITouch *> *)touches withEvent:(nullable UIEvent *)event { if (_currentSelectedManager) { _currentSelectedManager.currentDrawType = tapDrawImageViewNormalState;
[self setNeedsDisplay];
}
_currentSelectedManager = nil;
} @end