iOS评分（评价）星星图打分功能

//// 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viewUIView *_shouView;//放星星的背景viewCGFloat _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

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);}