大體思路：
1.創(chuàng)建5個imageview旗闽，每個加上灰色星星圖片（代表未選中）
2.1.手指滑動：手指在VC滑動時獲取手指位置锦募，判斷手指位置在第幾個星星處，獲取星星個數(shù)柏锄，把手指前邊的圖片賦上黃色星星圖片（代表選中）坪仇；
2.2.點擊結(jié)束時判斷點擊位置杂腰，前邊所有圖片賦值黃色星星，獲取星星個數(shù)椅文。
在展示評價頁面同理喂很，根據(jù)評價的分數(shù)給展示星星的imageview重新設置圖片。
2017年2月18日更新
Simulator Screen Shot 2017年2月18日 下午7.01.32.png
更新內(nèi)容：簡化代碼雾袱、分離出view恤筛，可直接使用官还。
Coding上Demo地址
EvaluateView中主要代碼
#import "EvaluateView.h"
@implementation EvaluateView
- (instancetype)initWithFrame:(CGRect)frame count:(int)count
{
self = [super initWithFrame:frame];
if (self)
{
[self createStarsWithCounts:count];
}
return self;
}
/**
創(chuàng)建星星的imageview
*/
- (void)createStarsWithCounts:(int)counts
{
//計算左右間距
CGFloat left = 20;
CGFloat middle = 10;
CGFloat width = (self.frame.size.width-2*left-middle*(counts-1))/counts;
self.imgWidth = width;
for (int i = 0; i < counts; i ++)
{
UIImageView *imgView = [[UIImageView alloc] initWithImage:UnSelectedImg];
imgView.tag = i;
[imgView setFrame:CGRectMake(left+i*width, left, width, width)];
[self addSubview:imgView];
}
}
/**
手指滑動時判選中第幾個星星
*/
- (void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
CGPoint point = [[touches anyObject] locationInView:self];
int x = point.x;
int y = point.y;
if (y >= 20 && y <= self.imgWidth + 20) //Y在星星同一行
{
if (x > 20 && x < self.frame.size.width - 20) //在星星范圍內(nèi)
{
self.count = (x - 20) / (self.imgWidth + 10) + 1;
[self refreshUI];
}
}
}
/**
點擊結(jié)束時判斷選擇的星星位置
*/
- (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
CGPoint point = [[touches anyObject] locationInView:self];
int x = point.x;
int y = point.y;
if (y >= 20 && y <= self.imgWidth + 20) //Y在星星同一行
{
if (x > 20 && x < self.frame.size.width - 20) //在星星范圍內(nèi)
{
self.count = (x - 20) / (self.imgWidth + 10) + 1;
[self refreshUI];
}
}
}
/**
根據(jù)選中星星數(shù)重新展示圖片
*/
- (void)refreshUI
{
//回調(diào)選中星星結(jié)果給VC
if ([self.delegate respondsToSelector:@selector(selectedStras:)])
{
[self.delegate selectedStras:self.count];
}
for (UIImageView *imgView in self.subviews)
{
if (imgView.tag < self.count)
{
[imgView setImage:SelectedImg];
}
else
{
[imgView setImage:UnSelectedImg];
}
}
}
@end
以下是老代碼芹橡，方便理解，但是質(zhì)量不是很好望伦。林说。。
1）滑動選擇星星觸發(fā)方法
- (void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
CGPoint point = [[touches anyObject] locationInView:self.view];
int x = point.x;
int y = point.y;
if (y >= 206 && y <= 246) //第一個星星的坐標范圍
{
if (x >= MWIDTH/2-120 && x <= MWIDTH/2 - 80)
{
[self.imageView1 setImage:self.selectedImage];
[self.imageView2 setImage:self.unSelectedImage];
[self.imageView3 setImage:self.unSelectedImage];
[self.imageView4 setImage:self.unSelectedImage];
[self.imageView5 setImage:self.unSelectedImage];
self.ranking = @"1";
}
else if (x > MWIDTH/2 - 70 && x <= MWIDTH/2 - 30)
{
[self.imageView1 setImage:self.selectedImage];
[self.imageView2 setImage:self.selectedImage];
[self.imageView3 setImage:self.unSelectedImage];
[self.imageView4 setImage:self.unSelectedImage];
[self.imageView5 setImage:self.unSelectedImage];
self.ranking = @"2";
}
else if (x > MWIDTH/2 - 20 && x <= MWIDTH/2 + 20)
{
[self.imageView1 setImage:self.selectedImage];
[self.imageView2 setImage:self.selectedImage];
[self.imageView3 setImage:self.selectedImage];
[self.imageView4 setImage:self.unSelectedImage];
[self.imageView5 setImage:self.unSelectedImage];
self.ranking = @"3";
}
else if (x > MWIDTH/2 + 30 && x <= MWIDTH/2 + 70)
{
[self.imageView1 setImage:self.selectedImage];
[self.imageView2 setImage:self.selectedImage];
[self.imageView3 setImage:self.selectedImage];
[self.imageView4 setImage:self.selectedImage];
[self.imageView5 setImage:self.unSelectedImage];
self.ranking = @"4";
}
else if (x > MWIDTH/2 + 80 && x <= MWIDTH/2 + 120)
{
[self.imageView1 setImage:self.selectedImage];
[self.imageView2 setImage:self.selectedImage];
[self.imageView3 setImage:self.selectedImage];
[self.imageView4 setImage:self.selectedImage];
[self.imageView5 setImage:self.selectedImage];
self.ranking = @"5";
}
}
}
2）直接點擊星星觸發(fā)方法
- (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
CGPoint point = [[touches anyObject] locationInView:self.view];
int x = point.x;
int y = point.y;
if (y >= 206 && y <= 246) //第一個星星的坐標范圍
{
if (x >= MWIDTH/2-120 && x <= MWIDTH/2 - 80)
{
[self.imageView1 setImage:self.selectedImage];
[self.imageView2 setImage:self.unSelectedImage];
[self.imageView3 setImage:self.unSelectedImage];
[self.imageView4 setImage:self.unSelectedImage];
[self.imageView5 setImage:self.unSelectedImage];
self.ranking = @"1";
}
else if (x > MWIDTH/2 - 70 && x <= MWIDTH/2 - 30)
{
[self.imageView1 setImage:self.selectedImage];
[self.imageView2 setImage:self.selectedImage];
[self.imageView3 setImage:self.unSelectedImage];
[self.imageView4 setImage:self.unSelectedImage];
[self.imageView5 setImage:self.unSelectedImage];
self.ranking = @"2";
}
else if (x > MWIDTH/2 - 20 && x <= MWIDTH/2 + 20)
{
[self.imageView1 setImage:self.selectedImage];
[self.imageView2 setImage:self.selectedImage];
[self.imageView3 setImage:self.selectedImage];
[self.imageView4 setImage:self.unSelectedImage];
[self.imageView5 setImage:self.unSelectedImage];
self.ranking = @"3";
}
else if (x > MWIDTH/2 + 30 && x <= MWIDTH/2 + 70)
{
[self.imageView1 setImage:self.selectedImage];
[self.imageView2 setImage:self.selectedImage];
[self.imageView3 setImage:self.selectedImage];
[self.imageView4 setImage:self.selectedImage];
[self.imageView5 setImage:self.unSelectedImage];
self.ranking = @"4";
}
else if (x > MWIDTH/2 + 80 && x <= MWIDTH/2 + 120)
{
[self.imageView1 setImage:self.selectedImage];
[self.imageView2 setImage:self.selectedImage];
[self.imageView3 setImage:self.selectedImage];
[self.imageView4 setImage:self.selectedImage];
[self.imageView5 setImage:self.selectedImage];
self.ranking = @"5";
}
}
}
