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设置评价星星
字体的大小适合布局的大小
[Lable名 sizeToFit];
.h
typedef enum kRatingViewStyle
{
kSmallStyle = 0,
kNormalStyle = 1
}kRatingViewStyle;
@interface RatingView : UIView
{
@private
UIView *_baseView;//透明的承载yellowStar的图层
NSMutableArray *_yellowStarArray;
NSMutableArray *_grayStarArray;
UILabel *_ratingLable;
CGFloat _ratingScore;
}
@property(nonatomic,assign)kRatingViewStyle style;
@property(nonatomic,assign)CGFloat ratingScore;
.m
#define kNormalWidth 35
#define kNormalHeight 33
#define kSmallWidth 15
#define kSmallHeight 14
#define kBaseViewWidth 10
#define kNormalFontSize 25
#define kSmallFontSize 12
初始化的时候调用：
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
[self initGrayStar];
[self initYellowStar];
[self ratingLable];
}
return self;
}
几星的布局是根据：
1.设置为灰色星星的层
-(void)initGrayStar
{
_grayStarArray = [[NSMutableArray alloc] initWithCapacity:5];
for (int index = 0; index < 5; index++) {
UIImageView * crayStar = [[UIImageView alloc] initWithFrame:CGRectZero];
crayStar.image = [UIImage imageNamed:@"gray"];
[self addSubview: crayStar];
[crayStar release];
[_grayStarArray addObject:crayStar];
}
}//灰色星星的初始化
2.设置黄色星星的层，并设置一个透明层，用来放置黄色的星星，然后用clipsToBounds UIView的属性 这会把多余的截掉
-(void)initYellowStar
{
_baseView = [[UIView alloc] initWithFrame:CGRectZero];
_baseView.backgroundColor = [UIColor clearColor];
_baseView.clipsToBounds = YES;
[self addSubview:_baseView];
_yellowStarArray = [[NSMutableArray alloc] initWithCapacity:5];
for (int index = 0; index < 5; index++) {
UIImageView *yellowStar = [[UIImageView alloc] initWithFrame:CGRectZero];
yellowStar.image = [UIImage imageNamed:@"yellow"];
[_baseView addSubview: yellowStar];
[yellowStar release];
[_yellowStarArray addObject:yellowStar];
}
}//黄色星星的初始化和透明层的初始化（_baseView 与 yellowStar）
3.设置RatingLable 的比率框
-(void)ratingLable
{
_ratingLable = [[UILabel alloc] initWithFrame:CGRectZero];
_ratingLable.backgroundColor = [UIColor clearColor];
_ratingLable.textColor = [UIColor purpleColor];
[self addSubview:_ratingLable];
}//-_atingLable评分框的初始化
4.在设置全局的RatingScore,用来接收和设置Rating 的样式
-(void)setRatingScore:(CGFloat)ratingScore
{
_ratingScore = ratingScore;
_ratingLable.text = [NSString stringWithFormat:@"%0.1f",_ratingScore];
}//设置评分的大小，赋值给_ratingLable
5.layoutSubviews 来布局
-(void)layoutSubviews
{
[super layoutSubviews];
int width = 0;
for (int index = 0; index < 5; index++) {
UIView *yellowStar = _yellowStarArray[index];
UIView *grayStar = _grayStarArray[index];
if (self.style == kSmallStyle) {
yellowStar.frame = CGRectMake(0+width , 0 , kSmallWidth, kSmallHeight);
grayStar.frame = CGRectMake(0+width, 0, kSmallWidth, kSmallHeight);
width +=kSmallWidth;
}else{
yellowStar.frame = CGRectMake(0+width , 0 , kNormalWidth, kNormalHeight);
grayStar.frame = CGRectMake(0+width, 0, kNormalWidth, kNormalHeight);
width +=kNormalWidth;
}
}//将两种星星排成一行
float baseViewWidth = 0;
baseViewWidth = self.ratingScore / kBaseViewWidth *width;
float height = 0;
if (self.style == kSmallStyle) {
_baseView.frame = CGRectMake(0, 0, baseViewWidth, kSmallHeight);
_ratingLable.font = [UIFont boldSystemFontOfSize:kSmallFontSize];
height = kSmallHeight;
}else
{
_baseView.frame = CGRectMake(0, 0, baseViewWidth, kNormalHeight);
_ratingLable.font = [UIFont boldSystemFontOfSize:kNormalFontSize];
height = kNormalHeight;
}//设置——baseView的两种不同样式的大小，——ratingLable的字体大小
//设置ratingLable 的大小和位置
_ratingLable.frame = CGRectMake(width, 0, 0, 0);
[_ratingLable sizeToFit];
//整体的大小和位置
self.frame = CGRectMake(self.frame.origin.x, self.frame.origin.y, width+_ratingLable.frame.size.width, height);
}//星星的排版
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原文地址：http://www.cnblogs.com/meixian/p/5371135.html
