iOS星星评分两种方式
2016-11-09 本文已影响140人
戴上耳机__世界与我无关
样式1
星星样式1.png
- 我们要做的就是图片上的5颗星星
- 根据分数判断我们该添加什么样式的星星
- (void)setLevel:(CGFloat)level{
_level = level;
//1.满星
NSInteger fullStarCount = (NSInteger)level;
for (NSInteger i = 0; i < fullStarCount; i++) {
//添加满星
[self makeStarViewWithImageName:@"full_star" startPosition:i];
}
//2.半星
if (level - fullStarCount) {
[self makeStarViewWithImageName:@"half_star" startPosition:fullStarCount];
//统计星星目前个数(满星+半星)
fullStarCount ++;
}
//3.空星
for (NSInteger i = fullStarCount; i < kStartCount ; i++) {
[self makeStarViewWithImageName:@"empty_star" startPosition:i];
}
}
2.根据位置设置设置图片
- (void)makeStarViewWithImageName:(NSString *)imageName startPosition:(NSInteger) position{
//如果重新设置评分,会重新创建imageView 需要判断 若已经存在5个imageView不去创建
UIImageView *imageView = nil;
if (self.subviews.count == kStartCount) {
imageView = self.subviews[position];
imageView.image = [UIImage imageNamed:imageName];
return;
}
imageView = [[UIImageView alloc]init];
imageView.image = [UIImage imageNamed:imageName];
[imageView sizeToFit];
imageView.frame = CGRectOffset(imageView.bounds, imageView.bounds.size.width * position, 0);
[self addSubview:imageView];
}
3 .如果不判断会出现下面的情况
bug.png
样式2
样式2.gif
- 本想通过循环创建5个imageView 但实现不了预期效果
1.加载xib 偷懒~
loadNibNamed: owner: options:
这个方法加载xib会把xib文件加载入缓存 不建议使用
+ (instancetype)loadStarView{
UINib *nib = [UINib nibWithNibName:@"XHStarView" bundle:nil];
XHStarView *starView = [[nib instantiateWithOwner:nil options:nil]lastObject];
return starView;
}
2 .判断是否添加星星
@implementation XHStarView{
BOOL _isAddStar;
}
3 . 判断点击的区域 (可以根据具体情况设置)
-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
UITouch *touch = [touches anyObject];
CGPoint point = [touch locationInView:self];
if((point.x > self.starOne.x && point.x < (self.starFive.x + self.starFive.width))&&(point.y > self.starOne.y && point.y< self.height)){
_isAddStar = YES;
}else{
_isAddStar = NO;
}
}
4 .移动的时候添加星星
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
if(_isAddStar){
UITouch *touch = [touches anyObject];
CGPoint point = [touch locationInView:self];
[self setStarForegroundViewWithPoint:point];
}
return;
}
5 .结束的时候禁止添加星星
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
if(_isAddStar){
UITouch *touch = [touches anyObject];
CGPoint point = [touch locationInView:self];
[self setStarForegroundViewWithPoint:point];
}
_isAddStar = NO;
return;
}
6 . 根据点击的位置x设置图片 并设置满星 1 分 半星0.5 空星0
-(CGFloat)changeImg:(float)x image:(UIImageView*)img{
if(x > img.x + img.width/2){
[img setImage:[UIImage imageNamed:@"StarSelected"]];
return 1;
}else if(x > img.x){
[img setImage:[UIImage imageNamed:@"StarSelectHeaf"]];
return 0.5;
}else{
[img setImage:[UIImage imageNamed:@"StarUnSelect"]];
return 0;
}
}
7 . 得出分数
-(void)setStarForegroundViewWithPoint:(CGPoint)point{
self.score = 0;
self.score = self.score + [self changeImg:point.x image:self.starOne];
self.score = self.score + [self changeImg:point.x image:self.starTwo];
self.score = self.score + [self changeImg:point.x image:self.starThree];
self.score = self.score + [self changeImg:point.x image:self.starFour];
self.score = self.score + [self changeImg:point.x image:self.starFive];
//评论最少半星
if(self.score == 0){
self.score = 0.5;
[self.starOne setImage:[UIImage imageNamed:@"StarSelectHeaf"]];
}
NSLog(@"分数 %f",self.score);
}
