XBCircleProgressView

圆圈倒计时的动画效果
支持设置方向、设置进度（带先快后慢动画）、支持设置前景色、后景色

效果图：

示例代码：

(void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
XBCircleProgressView *circleView = [XBCircleProgressView new];
[self.view addSubview:circleView];
_circleView = circleView;
circleView.delegate = self;
circleView.direction = XBCircleProgressViewDirection_anticlockwise;
circleView.frame = CGRectMake(100, 100, 200, 200);
circleView.waitTime = 10;
circleView.circleBorderWidth = 5;
//    circleView.backgroundColor = [UIColor grayColor];
//    circleView.foregroundColor = [UIColor redColor];
//    [circleView setProgress:0.5 animation:YES];
//    [circleView startAnimation];
}


(IBAction)changeProgress:(id)sender {
[_circleView setProgress:0.2 animation:YES];
}


(IBAction)reset:(id)sender {
[_circleView setProgress:0 animation:YES];
}


(void)circleProgressViewDidSettedProgress:(XBCircleProgressView *)progressView
{
[_circleView startAnimation];
}


(void)circleProgressViewOnTheEnd:(XBCircleProgressView *)progressView
{
//    [progressView removeFromSuperview];
//    _circleView = nil;
}


(id)circleProgressView:(XBCircleProgressView *)progressView titleForSeconds:(int)seconds totalSeconds:(int)totalSeconds
{
return [NSString stringWithFormat:@"%d",seconds];
}


@end