iOS自定义水平滚动条、进度条

HWSlider *slider = [[HWSlider alloc] initWithFrame:CGRectMake(10, 50, 300, 75)];[self.view addSubview:slider];

#import <UIKit/UIKit.h> @interface HWSlider : UIView @property (nonatomic, assign) NSInteger score; @end /*** ---------------分割线--------------- ***/ #import "HWSlider.h"#import "UIView+Additions.h" @interface HWSlider () @property (nonatomic, weak) UIImageView *bubbleImage;@property (nonatomic, weak) UIImageView *arrowImage;@property (nonatomic, weak) UILabel *scoreLabel;@property (nonatomic, weak) UILabel *levelLable;@property (nonatomic, weak) UIView *trackView;@property (nonatomic, weak) UIImageView *thumb; @end @implementation HWSlider - (instancetype)initWithFrame:(CGRect)frame{ if (self = [super initWithFrame:frame]) {  _score = 10;  self.backgroundColor = [UIColor whiteColor];    //气泡图片  UIImageView *bubbleImage = [[UIImageView alloc] initWithFrame:CGRectMake(self.bounds.size.width - 70, 0, 74, 35)];  [bubbleImage setImage:[UIImage imageNamed:@"alert_teacherEva_bubbleImage"]];  [self addSubview:bubbleImage];  _bubbleImage = bubbleImage;    //分数标签  UILabel *scoreLabel = [[UILabel alloc] initWithFrame:CGRectMake(self.bounds.size.width - 71.5, 0, 74, 28)];  scoreLabel.text = @"10";  scoreLabel.textColor = [UIColor blackColor];  scoreLabel.font = [UIFont systemFontOfSize:15.f];  scoreLabel.textAlignment = NSTextAlignmentCenter;  [self addSubview:scoreLabel];  _scoreLabel = scoreLabel;    //气泡箭头  UIImageView *arrowImage = [[UIImageView alloc] initWithFrame:CGRectMake(self.bounds.size.width - 16.5, 26, 13, 13)];  [arrowImage setImage:[UIImage imageNamed:@"alert_teacherEva_arrowImage"]];  [self addSubview:arrowImage];  _arrowImage = arrowImage;    //轨道可点击视图（轨道只设置了5pt，通过这个视图增加以下点击区域）  UIView *tapView = [[UIView alloc] initWithFrame:CGRectMake(0, 34, self.bounds.size.width, 20)];  [tapView addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTap:)]];  [self addSubview:tapView];    //轨道背景  UIView *backView = [[UIView alloc] initWithFrame:CGRectMake(0, 7.5, self.bounds.size.width, 5)];  backView.backgroundColor = [UIColor grayColor];  backView.layer.cornerRadius = 2.5f;  backView.layer.masksToBounds = YES;  [tapView addSubview:backView];    //轨道前景  UIView *trackView = [[UIView alloc] initWithFrame:CGRectMake(1.5, 9, self.bounds.size.width - 3, 2)];  trackView.backgroundColor = [UIColor greenColor];  trackView.layer.cornerRadius = 1.f;  trackView.layer.masksToBounds = YES;  [tapView addSubview:trackView];  _trackView = trackView;    //滑块  UIImageView *thumb = [[UIImageView alloc] initWithFrame:CGRectMake(self.bounds.size.width - 20, 34, 20, 20)];  [thumb setImage:[UIImage imageNamed:@"alert_teacherEva_sliderImg"]];  thumb.userInteractionEnabled = YES;  thumb.contentMode = UIViewContentModeCenter;  [thumb addGestureRecognizer:[[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handlePan:)]];  [self addSubview:thumb];  _thumb = thumb;    //级别标签  UILabel *levelLable = [[UILabel alloc] initWithFrame:CGRectMake(0, CGRectGetMaxY(thumb.frame) + 7, self.bounds.size.width, 13)];  levelLable.text = @"非常满意";  levelLable.textColor = [UIColor blackColor];  levelLable.font = [UIFont systemFontOfSize:13.f];  levelLable.textAlignment = NSTextAlignmentCenter;  [self addSubview:levelLable];  _levelLable = levelLable; }  return self;} - (void)setScore:(NSInteger)score{ _score = score;  //刷新视图 [self reloadViewWithThumbCeneterX:score / 10.0 * self.bounds.size.width];} //点击滑动条- (void)handleTap:(UITapGestureRecognizer *)sender{ //刷新视图 [self reloadViewWithThumbCeneterX:[sender locationInView:self].x];} //滑动滑块- (void)handlePan:(UIPanGestureRecognizer *)sender{ //获取偏移量 CGFloat moveX = [sender translationInView:self].x;  //重置偏移量，避免下次获取到的是原基础的增量 [sender setTranslation:CGPointMake(0, 0) inView:self];  //计算当前中心值 CGFloat centerX = _thumb.centerX + moveX;  //防止瞬间大偏移量滑动影响显示效果 if (centerX < 10) centerX = 10; if (centerX > self.bounds.size.width - 10) centerX = self.bounds.size.width - 10;  //刷新视图 [self reloadViewWithThumbCeneterX:centerX];} - (void)reloadViewWithThumbCeneterX:(CGFloat)thumbCeneterX{ //更新轨道前景色 _trackView.frameWidth = thumbCeneterX;  //更新滑块位置 _thumb.centerX = thumbCeneterX; if (_thumb.centerX < 10) {  _thumb.centerX = 10; }else if (_thumb.centerX > self.bounds.size.width - 10) {  _thumb.centerX = self.bounds.size.width - 10; }  //更新箭头位置 _arrowImage.centerX = _thumb.centerX;  //更新气泡标签位置（气泡图片宽度74，实际内容宽度66） _bubbleImage.centerX = _thumb.centerX; if (_bubbleImage.centerX < 33) {  _bubbleImage.centerX = 33; }else if (_bubbleImage.centerX > self.bounds.size.width - 33) {  _bubbleImage.centerX = self.bounds.size.width - 33; }  //更新分数标签位置 _scoreLabel.centerX = _bubbleImage.centerX;  //分数，四舍五入取整 _score = round(thumbCeneterX / self.bounds.size.width * 10);  //更新标签内容 _scoreLabel.text = [NSString stringWithFormat:@"%ld", _score]; if (_score <= 3) {  _levelLable.text = @"极不满意"; }else if (_score <= 5) {  _levelLable.text = @"不满意"; }else if (_score <= 7) {  _levelLable.text = @"一般"; }else if (_score <= 9) {  _levelLable.text = @"满意"; }else if (_score == 10) {  _levelLable.text = @"非常满意"; }} @end