iOS评分（评价）星星图打分功能_IOS开发教程-查字典教程网

下载地址：https://github.com/littleSunZheng/StarGradeView

起因：项目中往往涉及到用户的评分反馈，在我的“E中医”项目中，涉及到几处。对此我参考了美团和滴滴的评分图。

评分视图分为展示和评分两种：

（1）多数情况下“评分功能”是要简介易用的。那种星星准确显示百分比（分数）的功能反而不好用，这种多数用在显示评分上，不需要用户去点击，因为用户想评价“9.8分”，手指头是不能准确点击的。但是显示的时候你根据数据可以完美的显示出来。实现原理就是两图片，一张是“灰色”星星五颗，一张是“金色”星星五颗。让imageView的模式设置好（多余的照片不显示）。按照比例将上层金色星星imageView的长调整好，星星比例就自然显示好了。

（2）用户操作打分的星星视图：我这里做的就是打分的。实现原理很简单，当你操作其他软件的功能时就能结合想到手势。

上源码：

// // StarGradeView.h // EcmCustomer // // Created by 郑鹏 on 2016/11/4. // Copyright © 2016年张进. All rights reserved. // #import <UIKit/UIKit.h> @protocol StarGradeViewDelegate <NSObject> - (void)didSelectedIndex:(NSString *)index; @end @interface StarGradeView : UIView @property (nonatomic, assign) id <StarGradeViewDelegate> delegate; // 视图frame 和想有几个星星（取决于设计 5个常用或者10个） - (instancetype)initWithFrame:(CGRect)frame withtNumberOfPart:(NSInteger)num; @end // // StarGradeView.m // EcmCustomer // // Created by 郑鹏 on 2016/11/4. // Copyright © 2016年张进. All rights reserved. // #import "StarGradeView.h" @interface StarGradeView(){ UIView *_btnView;//放星星的背景view UIView *_shouView;//放星星的背景view CGFloat _height;//星星的高 NSInteger _btnNum;//按钮的数量 NSInteger _index;//第几个 } @end @implementation StarGradeView - (instancetype)initWithFrame:(CGRect)frame withtNumberOfPart:(NSInteger)num{ self = [super initWithFrame:frame]; _height = frame.size.height; _btnNum = num; CGFloat selfW = frame.size.width; CGFloat starW = frame.size.height; _btnView = [[UIView alloc] initWithFrame:CGRectMake((selfW - starW*num)/2 , 0, starW*num, starW)]; for (int i = 0; i< num; i++) { UIButton *starBtn = [UIButton buttonWithType:UIButtonTypeCustom]; starBtn.frame = CGRectMake(starW * i, 0, starW, starW); [starBtn setImage:[UIImage imageNamed:@"star_off"] forState:UIControlStateNormal]; [starBtn setImage:[UIImage imageNamed:@"star_on"] forState:UIControlStateSelected]; starBtn.tag = 1991+i; [starBtn setAdjustsImageWhenHighlighted:NO]; [_btnView addSubview:starBtn]; } _shouView = [[UIView alloc] initWithFrame:CGRectMake(0 , 0, starW*num, starW)]; [_btnView addSubview:_shouView]; [self addSubview:_btnView]; return self; } //滑动需要的。 - (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{ CGPoint point = [self getTouchPoint:touches]; int j = (int)(point.x/_height); _index = j; for (NSInteger i = 0; i < _btnNum; i++) { if (i<=j) { UIButton *btn = [_btnView viewWithTag:i+1991]; btn.selected = YES; }else{ UIButton *btn = [_btnView viewWithTag:i+1991]; btn.selected = NO; } } } //滑动需要的。 - (void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{ CGPoint point = [self getTouchPoint:touches]; int j = (int)(point.x/_height); _index = j; for (NSInteger i = 0; i < _btnNum; i++) { if (i<=j) { UIButton *btn = [_btnView viewWithTag:i+1991]; btn.selected = YES; }else{ UIButton *btn = [_btnView viewWithTag:i+1991]; btn.selected = NO; } } } //滑动需要的。 - (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{ if ([self.delegate respondsToSelector:@selector(didSelectedIndex:)]) { [self.delegate didSelectedIndex:[NSString stringWithFormat:@"%ld",_index+1]]; } } //取到手势在屏幕上点的位置point - (CGPoint)getTouchPoint:(NSSet<UITouch *>*)touches{ UITouch *touch = [touches anyObject]; CGPoint point = [touch locationInView:_shouView]; return point; } //如果点击的范围在按钮的区域 - (BOOL)pointInBtn:(UIButton *)btn WithPoint:(CGPoint)point{ if (CGRectContainsPoint(btn.frame, point)) { return YES; }else{ return NO; } return nil; } /* // Only override drawRect: if you perform custom drawing. // An empty implementation adversely affects performance during animation. - (void)drawRect:(CGRect)rect { // Drawing code } */ @end

使用时：

StarGradeView *view = [[StarGradeView alloc] initWithFrame:CGRectMake(0, 100, 375, 40) withtNumberOfPart:5]; view.delegate = self; [self.view addSubview:view]; //并实现代理方法 - (void)didSelectedIndex:(NSString *)index{ NSLog(@"%@",index); }

注释：这里切图时注意：只要一个星星，并且要求是正方形星星图片有留白。看代码就明白为什么要这么切图。1是美观 2是容易计算。

以上所述是小编给大家介绍的iOS评分（评价）星星图打分功能，希望对大家有所帮助，如果大家有任何疑问请给我们留言，小编会及时回复大家的。在此也非常感谢大家对查字典教程网的支持！