IOS 开发自定义条形ProgressView的实例

-(instancetype)initWithFrame:(CGRect)frame withStartNum:(CGFloat)startNum withEndNum:(CGFloat)endNum withSignNum:(CGFloat)signNum withTime:(CGFloat)time{  if (self = [super initWithFrame:frame]) {    self.startNum = startNum;    self.endNum = endNum;    self.signNum = signNum;    if(time == 0){      self.time = 0.1;    }else{      self.time = time;    }    [self setUpSubViews];  }  return self;}- (void)setUpSubViews{  UIView *backView = [[UIView alloc] init];  backView.backgroundColor =BoomViewColor;  backView.layer.cornerRadius = CornerRadius;  backView.layer.masksToBounds = YES;  [self addSubview:backView];  self.backView = backView;  UIView *fontView = [[UIView alloc] init];  fontView.backgroundColor = UpViewColor;  fontView.layer.cornerRadius = CornerRadius;  fontView.layer.masksToBounds = YES;  [self addSubview:fontView];  self.fontView = fontView;}-(void)progressViewStart{  if (self.timer == nil) {    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{      self.timer = [NSTimer scheduledTimerWithTimeInterval:self.time target:self selector:@selector(changeProgressViewFrame:) userInfo:nil repeats:YES];      [[NSRunLoop mainRunLoop] addTimer:self.timer forMode:NSRunLoopCommonModes];    });  }}-(void)changeProgressViewFrame:(NSTimer *)timer{  //位置计算  CGFloat signProgress = (self.signNum - self.startNum) / (self.endNum - self.startNum);  NSLog(@"==>>>%f",self.progress);  if (self.progress >= signProgress){    [self.timer invalidate];    self.timer = nil;    return;  }  self.progress += 0.01;  [self setNeedsLayout];}-(void)layoutSubviews{  [super layoutSubviews];  NSLog(@"==>>>%f",self.progress);  self.backView.frame = self.bounds;  self.fontView.frame = self.bounds;  self.fontView.width = self.width * self.progress;}