方法一：
#import "StarView.h"
@implementation StarView
- (instancetype)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self != nil) {
[self _initCtreateViews];
}
return self;
}
- (void)awakeFromNib
{
[super awakeFromNib];
[self _initCtreateViews];
}
//创建视图
- (void)_initCtreateViews
{
//灰色星星
UIImage *grayImage = [UIImage p_w_picpathNamed:@"gray.png"];
//***星星
UIImage *yellowImage = [UIImage p_w_picpathNamed:@"yellow.png"];
//创建灰色星星视图
_grayStarView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, grayImage.size.width * 5, grayImage.size.height)];
_grayStarView.backgroundColor = [UIColor colorWithPatternImage:grayImage];
[self addSubview:_grayStarView];
//创建***星星视图
_yellowStarView = [[UIView alloc] initWithFrame:_grayStarView.bounds];
_yellowStarView.backgroundColor = [UIColor colorWithPatternImage:yellowImage];
[self addSubview:_yellowStarView];
//让当前视图的宽度等于高度的5倍
self.width = self.height * 5;
//星星进行缩放
//计算要缩放的倍数
CGFloat scale = self.height / grayImage.size.height;
_grayStarView.transform = CGAffineTransformMakeScale(scale, scale);
_yellowStarView.transform = CGAffineTransformMakeScale(scale, scale);
//当星星视图修改了transform后，坐标会发生改变，需要重新恢复坐标（transform是以中心点不变进行放缩的）
_grayStarView.origin = CGPointMake(0, 0);
_yellowStarView.origin = CGPointZero;//CGPointZero等价于CGPointMake(0, 0)
}
- (void)setRating:(CGFloat)rating
{
if (_rating != rating) {
_rating = rating;
_yellowStarView.width = _rating / 10 * _grayStarView.width;
// NSLog(@"--------%.2f",_yellowStarView.width);
// NSLog(@"-----sdfs%.2f",_grayStarView.width);
}
}
@end
方法二：
方法一
UIImageView *starView = (UIImageView *)[self.contentView viewWithTag:202];
UIImage *p_w_picpath = [UIImage p_w_picpathNamed:@"[email protected]"];
//修改图片大小
UIGraphicsBeginImageContext(CGSizeMake(28, 24));
[p_w_picpath drawInRect:CGRectMake(0, 0, 28, 24)];
p_w_picpath = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
starView.backgroundColor = [UIColor colorWithPatternImage:p_w_picpath];
//获取评分
// NSString *rating = ratingName.text;
// CGFloat f = [rating floatValue];
UIImageView *imgView1 = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0,28 * (f / 2), 24)];
[starView addSubview:imgView1];
UIImage *p_w_picpath1 = [UIImage p_w_picpathNamed:@"[email protected]"];
//修改图片大小
UIGraphicsBeginImageContext(CGSizeMake(28, 24));
[p_w_picpath1 drawInRect:CGRectMake(0, 0, 28, 24)];
p_w_picpath1 = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
imgView1.backgroundColor = [UIColor colorWithPatternImage:p_w_picpath1];