最近项目中需要评分⭐️，2种用法，1.只需要展示，不需要点击评分；2.需要点击评分。
HDScoreStarView.h
#import <UIKit/UIKit.h>
NS_ASSUME_NONNULL_BEGIN
@interface HDScoreStarView : UIView
/*
*@pramas spacing 星星之间的间距
*/
@property (nonatomic, assign, readwrite) CGFloat spacing;
/*
*@pramas starCount 星星需要设置成的数量
大小为：1～5，超过5则置为5
默认不设置，用于点击评分
设置了则表示用于展示评分，不可点击
*/
@property (nonatomic, assign, readwrite) NSUInteger starCount;
/*
*@pramas tapEnabled 关闭星星点击手势
*/
@property (nonatomic, assign, readwrite, getter=isTapEnabled) BOOL tapEnabled;
/// 点击了几个星星
@property(nonatomic,strong) void(^indexCount)(NSUInteger indexCount);
@end
NS_ASSUME_NONNULL_END
HDScoreStarView.m
#import "HDScoreStarView.h"
@interface HDScoreStarView()
@property (nonatomic, assign) NSUInteger index;
//需要替换成自己项目中的星星☆图片名称
@property (nonatomic, copy) NSString *imageNameNor; //图片名称☆
@property (nonatomic, copy) NSString *imageNameSel; //选中的图片名称⭐️
@end
@implementation HDScoreStarView
#pragma mark - init
- (instancetype)initWithFrame:(CGRect)frame {
if (self = [super initWithFrame:frame]) {
//初始化 用于评价
self.imageNameNor = @"common_icon_star64_sel";
self.imageNameSel = @"common_icon_star64_nor";
};
return self;
}
- (void)setStarCount:(NSUInteger)starCount {
if (starCount == 0) {
return;
}
if (_starCount != starCount) {
_starCount = starCount;
if (starCount > 5) {
starCount = 5;
}
self.index = starCount;
[self setNeedsDisplay];
//设置了startCount 则不能点击 只做展示用
self.tapEnabled = NO;
self.imageNameNor = @"common_icon_star32_sel";
self.imageNameSel = @"common_icon_star32_nor";
}
}
- (void)setTapEnabled:(BOOL)tapEnabled {
_tapEnabled = tapEnabled;
self.userInteractionEnabled = tapEnabled;
}
#pragma mark - 绘制
- (void)drawRect:(CGRect)rect {
UIImage *norImage = [UIImage imageNamed:self.imageNameNor];
UIImage *selImage = [UIImage imageNamed:self.imageNameSel];
CGContextRef context = UIGraphicsGetCurrentContext();
CGFloat spacing = self.spacing;
CGFloat starWidth = (self.frame.size.width - (spacing *4)) / 5;
for (NSInteger i = 0; i < 5; i ++) {
UIImage *drawImage = i < self.index ? selImage : norImage;
[self drawImage:context CGImageRef:drawImage.CGImage CGRect:CGRectMake((starWidth + spacing) * i, 0, starWidth, self.frame.size.height)];
}
}
- (void)drawImage:(CGContextRef)context
CGImageRef:(CGImageRef)image
CGRect:(CGRect)rect {
CGContextSaveGState(context);
CGContextTranslateCTM(context, rect.origin.x, rect.origin.y);
CGContextTranslateCTM(context, 0, rect.size.height);
CGContextScaleCTM(context, 1.0, -1.0);
CGContextTranslateCTM(context, -rect.origin.x, -rect.origin.y);
CGContextDrawImage(context, rect, image);
CGContextRestoreGState(context);
}
#pragma mark - touch
- (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
UITouch *touch = [touches anyObject];
CGPoint point = [touch locationInView:self];
self.index = point.x / (self.frame.size.width / 5) + 1;
if (self.index == 6) {
self.index --;
}
[self setNeedsDisplay];
if (self.indexCount) {
self.indexCount(self.index);
}
}
- (void)touchesCancelled:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
[self touchesEnded:touches withEvent:event];
}
@end
