由于项目的需要，需要设计能评分、能显示评分数据的星级评分条，但是IOS上好像没有这个控件，Android是有RatingBar这个控件的（又发现一个IOS不如Android好的
），那就只能自定义了，在网上也找了相关的例子，发现都是很老的版本了，非ARC版本的，而且不能评分成0分，还没有indicator效果，于是我自己重新写了一个控件，命名为RatingBar
先上一张我们做之后的效果图：
第一步：
写一个继承自UIView的RatingBar子控件
第二步：
声明一个RatingBar修改评分的代理，就是评分修改后把最新的评分告诉对方
第三步：
在.h文件中声明一些要暴漏给别人调用的方法
第四步：
在.m文件中实现评分条
具体代码如下：
RatingBar.h文件代码
#import <UIKit/UIKit.h>
@class RatingBar;
/**
* 星级评分条代理
*/
@protocol RatingBarDelegate <NSObject>
/**
* 评分改变
*
* @param ratingBar 评分控件
* @param newRating 评分值
*/
- (void)ratingBar:(RatingBar *)ratingBar ratingChanged:(float)newRating;
@end
@interface RatingBar : UIView
/**
* 初始化设置未选中图片、半选中图片、全选中图片，以及评分值改变的代理（可以用
* Block）实现
*
* @param deselectedName 未选中图片名称
* @param halfSelectedName 半选中图片名称
* @param fullSelectedName 全选中图片名称
* @param delegate 代理
*/
- (void)setImageDeselected:(NSString *)deselectedName halfSelected:(NSString *)halfSelectedName fullSelected:(NSString *)fullSelectedName andDelegate:(id<RatingBarDelegate>)delegate;
/**
* 设置评分值
*
* @param rating 评分值
*/
- (void)displayRating:(float)rating;
/**
* 获取当前的评分值
*
* @return 评分值
*/
- (float)rating;
/**
* 是否是指示器，如果是指示器，就不能滑动了，只显示结果，不是指示器的话就能滑动修改值
* 默认为NO
*/
@property (nonatomic,assign) BOOL isIndicator;
@end
.m文件
#import "RatingBar.h"
@interface RatingBar (){
float starRating;
float lastRating;
float height;
float width;
UIImage *unSelectedImage;
UIImage *halfSelectedImage;
UIImage *fullSelectedImage;
}
@property (nonatomic,strong) UIImageView *s1;
@property (nonatomic,strong) UIImageView *s2;
@property (nonatomic,strong) UIImageView *s3;
@property (nonatomic,strong) UIImageView *s4;
@property (nonatomic,strong) UIImageView *s5;
@property (nonatomic,weak) id<RatingBarDelegate> delegate;
@end
@implementation RatingBar
/**
* 初始化设置未选中图片、半选中图片、全选中图片，以及评分值改变的代理（可以用
* Block）实现
*
* @param deselectedName 未选中图片名称
* @param halfSelectedName 半选中图片名称
* @param fullSelectedName 全选中图片名称
* @param delegate 代理
*/
-(void)setImageDeselected:(NSString *)deselectedName halfSelected:(NSString *)halfSelectedName fullSelected:(NSString *)fullSelectedName andDelegate:(id<RatingBarDelegate>)delegate{
self.delegate = delegate;
unSelectedImage = [UIImage imageNamed:deselectedName];
halfSelectedImage = halfSelectedName == nil ? unSelectedImage : [UIImage imageNamed:halfSelectedName];
fullSelectedImage = [UIImage imageNamed:fullSelectedName];
height = 0.0,width = 0.0;
if (height < [fullSelectedImage size].height) {
height = [fullSelectedImage size].height;
}
if (height < [halfSelectedImage size].height) {
height = [halfSelectedImage size].height;
}
if (height < [unSelectedImage size].height) {
height = [unSelectedImage size].height;
}
if (width < [fullSelectedImage size].width) {
width = [fullSelectedImage size].width;
}
if (width < [halfSelectedImage size].width) {
width = [halfSelectedImage size].width;
}
if (width < [unSelectedImage size].width) {
width = [unSelectedImage size].width;
}
//控件宽度适配
CGRect frame = [self frame];
CGFloat viewWidth = width * 5;
if (frame.size.width > viewWidth) {
viewWidth = frame.size.width;
}
frame.size.width = viewWidth;
frame.size.height = height;
[self setFrame:frame];
starRating = 0.0;
lastRating = 0.0;
_s1 = [[UIImageView alloc] initWithImage:unSelectedImage];
_s2 = [[UIImageView alloc] initWithImage:unSelectedImage];
_s3 = [[UIImageView alloc] initWithImage:unSelectedImage];
_s4 = [[UIImageView alloc] initWithImage:unSelectedImage];
_s5 = [[UIImageView alloc] initWithImage:unSelectedImage];
//星星图片之间的间距
CGFloat space = (CGFloat)(viewWidth - width*5)/6;
CGFloat startX = space;
[_s1 setFrame:CGRectMake(startX, 0, width, height)];
startX += width + space;
[_s2 setFrame:CGRectMake(startX, 0, width, height)];
startX += width + space;
[_s3 setFrame:CGRectMake(startX, 0, width, height)];
startX += width + space;
[_s4 setFrame:CGRectMake(startX, 0, width, height)];
startX += width + space;
[_s5 setFrame:CGRectMake(startX, 0, width, height)];
[_s1 setUserInteractionEnabled:NO];
[_s2 setUserInteractionEnabled:NO];
[_s3 setUserInteractionEnabled:NO];
[_s4 setUserInteractionEnabled:NO];
[_s5 setUserInteractionEnabled:NO];
[self addSubview:_s1];
[self addSubview:_s2];
[self addSubview:_s3];
[self addSubview:_s4];
[self addSubview:_s5];
}
/**
* 设置评分值
*
* @param rating 评分值
*/
-(void)displayRating:(float)rating{
[_s1 setImage:unSelectedImage];
[_s2 setImage:unSelectedImage];
[_s3 setImage:unSelectedImage];
[_s4 setImage:unSelectedImage];
[_s5 setImage:unSelectedImage];
if (rating >= 0.5) {
[_s1 setImage:halfSelectedImage];
}
if (rating >= 1) {
[_s1 setImage:fullSelectedImage];
}
if (rating >= 1.5) {
[_s2 setImage:halfSelectedImage];
}
if (rating >= 2) {
[_s2 setImage:fullSelectedImage];
}
if (rating >= 2.5) {
[_s3 setImage:halfSelectedImage];
}
if (rating >= 3) {
[_s3 setImage:fullSelectedImage];
}
if (rating >= 3.5) {
[_s4 setImage:halfSelectedImage];
}
if (rating >= 4) {
[_s4 setImage:fullSelectedImage];
}
if (rating >= 4.5) {
[_s5 setImage:halfSelectedImage];
}
if (rating >= 5) {
[_s5 setImage:fullSelectedImage];
}
starRating = rating;
lastRating = rating;
[_delegate ratingBar:self ratingChanged:rating];
}
/**
* 获取当前的评分值
*
* @return 评分值
*/
-(float)rating{
return starRating;
}
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
[super touchesBegan:touches withEvent:event];
}
-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{
[self touchesRating:touches];
}
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{
[self touchesRating:touches];
}
//触发
- (void)touchesRating:(NSSet *)touches{
if (self.isIndicator) {
return;
}
CGPoint point = [[touches anyObject] locationInView:self];
//星星图片之间的间距
CGFloat space = (CGFloat)(self.frame.size.width - width*5)/6;
float newRating = 0;
if (point.x >= 0 && point.x <= self.frame.size.width) {
if (point.x <= space+width*0.5f) {
newRating = 0.5;
}else if (point.x < space*2+width){
newRating = 1.0;
}else if (point.x < space*2+width*1.5){
newRating = 1.5;
}else if (point.x <= 3*space+2*width){
newRating = 2.0;
}else if (point.x <= 3*space+2.5*width){
newRating = 2.5;
}else if (point.x <= 4*space+3*width){
newRating = 3.0;
}else if (point.x <= 4*space+3.5*width){
newRating = 3.5;
}else if (point.x <= 5*space+4*width){
newRating = 4.0;
}else if (point.x <=5*space+4.5*width){
newRating = 4.5;
}else {
newRating = 5.0;
}
}
if (newRating != lastRating){
[self displayRating:newRating];
}
}
@end
调用：
#import "ViewController.h"
#import "RatingBar.h"
@interface ViewController ()<RatingBarDelegate>
@property (nonatomic,strong) UILabel *mLabel;
@property (nonatomic,strong) RatingBar *ratingBar1;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
[self setupViews];
}
#pragma mark - 初始化view
- (void)setupViews{
self.view.backgroundColor = [UIColor whiteColor];
//RatingBar1
CGFloat width = 200;
CGFloat x = (self.view.bounds.size.width - width)*0.5;
self.ratingBar1 = [[RatingBar alloc] initWithFrame:CGRectMake(x, 100, width, 50)];
//添加到view中
[self.view addSubview:self.ratingBar1];
//是否是指示器
self.ratingBar1.isIndicator = NO;
[self.ratingBar1 setImageDeselected:@"iconfont-xingunselected" halfSelected:@"iconfont-banxing" fullSelected:@"iconfont-xing" andDelegate:self];
//RatingBar2
CGFloat width2 = 250;
CGFloat x2 = (self.view.bounds.size.width - width2)*0.5;
self.ratingBar2 = [[RatingBar alloc] initWithFrame:CGRectMake(x2, 200, width2, 50)];
self.ratingBar2.isIndicator = NO;
[self.ratingBar2 setImageDeselected:@"iconfont-xingunselected" halfSelected:@"iconfont-banxing" fullSelected:@"iconfont-xing" andDelegate:self];
[self.view addSubview:self.ratingBar2];
//RatingBar3
CGFloat width3 = 300;
CGFloat x3 = (self.view.bounds.size.width - width3)*0.5;
self.ratingBar3 = [[RatingBar alloc] initWithFrame:CGRectMake(x3, 300, width3, 50)];
self.ratingBar3.isIndicator = NO;
[self.ratingBar3 setImageDeselected:@"iconfont-xingunselected" halfSelected:@"iconfont-banxing" fullSelected:@"iconfont-xing" andDelegate:self];
[self.view addSubview:self.ratingBar3];
//显示结果的UILabel
CGFloat labelX = (self.view.bounds.size.width - 400)*0.5f;
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(labelX, 400, 400, 50)];
label.textAlignment = NSTextAlignmentCenter;
[self.view addSubview:label];
self.mLabel = label;
}
#pragma mark - RatingBar delegate
-(void)ratingBar:(RatingBar *)ratingBar ratingChanged:(float)newRating{
if (self.ratingBar1 == ratingBar) {
self.mLabel.text = [NSString stringWithFormat:@"第一个评分条的当前结果为:%.1f",newRating];
}else if (self.ratingBar2 == ratingBar){
self.mLabel.text = [NSString stringWithFormat:@"第二个评分条的当前结果为:%.1f",newRating];
}else if (self.ratingBar3 == ratingBar){
self.mLabel.text = [NSString stringWithFormat:@"第三个评分条的当前结果为:%.1f",newRating];
}
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end