评分视图的封装 （星星 RatingView）

#import "RatingView.h"

#define kRatingScale 10

@implementation RatingView

{

     UIView *_grayStarView,*_yellowStarView;

}

 

// 代码创建

- (id)initWithFrame:(CGRect)frame {

 

    if (self = [super initWithFrame:frame]) {

        

        

        self.backgroundColor = [UIColor clearColor];

        [self creatKits];//加载子控件

    }

 

    return self;

}

 

//通过xib文件加载

- (void)awakeFromNib {

 

    [super awakeFromNib];

    

    self.backgroundColor = [UIColor clearColor];

    [self creatKits];

 

}

 

// 通过storyBoard创建

- (id)initWithCoder:(NSCoder *)aDecoder {

 

    if (self = [super initWithCoder:aDecoder]) {

        

        self.backgroundColor = [UIColor clearColor];

        [self creatKits];

    }

 

    return self;

}

 

 

// 加载子视图

- (void)creatKits {

 

    

    // 获取加载的星星图片，需要的时图片的饿size属性

    UIImage *starImage = [UIImage imageNamed:@"gray"];

    CGFloat width = starImage.size.width;

    CGFloat height = starImage.size.height;

    

    

    // 初始化星星视图  宽为星星图片的宽的5倍

    _grayStarView = [[UIView alloc] initWithFrame:CGRectMake(0, 0,  width*5, height)];

    _grayStarView.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"gray"]];

    [self addSubview:_grayStarView];

    

    _yellowStarView = [[UIView alloc] initWithFrame:CGRectMake(0, 0,  width*5, height)];

    _yellowStarView.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"yellow"]];

    [self addSubview:_yellowStarView];

    

    

    

    // 计算星星视图的形变比例  使得星星视图的大小与评分视图一致

    CGFloat scale1 = self.frame.size.width/(width *5);

    CGFloat scale2 = self.frame.size.height/height;

    _grayStarView.transform = CGAffineTransformMakeScale(scale1, scale2);

    _yellowStarView.transform = CGAffineTransformMakeScale(scale1, scale2);

    

    

    // 重置星星视图的坐标

    CGRect grayStarFrame = _grayStarView.frame;

    grayStarFrame.origin = CGPointMake(0, 0);

    _grayStarView.frame = grayStarFrame;

    _yellowStarView.frame = grayStarFrame;

    

}

 

- (void)setRating:(CGFloat)rating {

 

    _rating = rating;

    CGRect rect = self.bounds;

    

    rect.size.width  = rect.size.width*(rating/kRatingScale);

    

    _yellowStarView.frame = rect;

}