iOS评分(评价)星星图打分功能

 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留言,小编会及时回复大家的。在此也非常感谢大家对呐喊教程网站的支持!

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