ios 入屏广告

主界面上蒙版广告。
//背景
_retuAnimview = [[ReturnAnimationView alloc]initWithFrame:[UIApplication sharedApplication].keyWindow.bounds] ;
广告结束移除蒙版

圆环进度条

屏幕快照 2019-07-11 下午12.44.08.png

原理：

//贝塞尔曲线
@property (nonatomic, strong) UIBezierPath *bezierPath;
//layer
@property (nonatomic, strong) CAShapeLayer *progressLayer;


- (UIBezierPath *)bezierPath
{
    if (!_bezierPath) {
        
        CGFloat width = CGRectGetWidth(self.frame)/2.0f;
        CGFloat height = CGRectGetHeight(self.frame)/2.0f;
        CGPoint centerPoint = CGPointMake(width, height);
        float radius = CGRectGetWidth(self.frame)/2;
        //贝塞尔画出路径
        _bezierPath = [UIBezierPath bezierPathWithArcCenter:centerPoint
                                                     radius:radius
                                                 startAngle:degreesToRadians(-90)
                                                   endAngle:degreesToRadians(270)
                                                  clockwise:YES];
    }
    return _bezierPath;
}


- (CAShapeLayer *)progressLayer
{
    if (!_progressLayer) {
        _progressLayer = [CAShapeLayer layer];
        _progressLayer.frame = self.bounds;
        _progressLayer.fillColor = [UIColor clearColor].CGColor;
        _progressLayer.lineWidth = self.lineWidth ? self.lineWidth : 2.f;
        _progressLayer.lineCap = kCALineCapRound;
        _progressLayer.strokeColor = self.progressColor.CGColor ? self.progressColor.CGColor  : [UIColor grayColor].CGColor;
        _progressLayer.strokeStart = 0.f;
        //动画
        CABasicAnimation *pathAnimation = [CABasicAnimation animationWithKeyPath:@"strokeEnd"];
        pathAnimation.duration = self.animationDuration;
        pathAnimation.fromValue = @(0.0);
        pathAnimation.toValue = @(1.0);
        pathAnimation.removedOnCompletion = YES;
        pathAnimation.delegate = self;
        [_progressLayer addAnimation:pathAnimation forKey:nil];
//layer的路径等于贝塞尔的路径
        _progressLayer.path = _bezierPath.CGPath;
    }
    return _progressLayer;
}