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QQ去除未读状态的动画

2024-08-09 07:18:50   218人阅读

QQ去除未读状态的动画

by 伍雪颖

技术分享
github代码

- (void)drawRect:(CGRect)rect {
    switch (_state) {
        caseSRSlimeStateNormal:
        {
            float percent =1 -distansBetween(_startPoint ,_toPoint) /_viscous;
            if (percent ==1) {
                CGContextRef context =UIGraphicsGetCurrentContext();
                UIBezierPath *path = [UIBezierPathbezierPathWithRoundedRect:CGRectMake(_startPoint.x - _radius,_startPoint.y -_radius,2*_radius,2*_radius)
                                                                cornerRadius:_radius];
                [selfsetContext:contextpath:path];
                CGContextDrawPath(context,kCGPathFillStroke);
            }else {
                CGFloat startRadius =_radius * (kStartTo + (1-kStartTo)*percent);
                CGFloat endRadius =_radius * (kEndTo + (1-kEndTo)*percent);
                CGContextRef context =UIGraphicsGetCurrentContext();
               
                UIBezierPath *path = [selfbodyPath:startRadius
                                                end:endRadius
                                            percent:percent];
                [selfsetContext:contextpath:path];
                CGContextDrawPath(context,kCGPathFillStroke);
                if (percent <=0) {
                    _state =SRSlimeStateShortening;
                    [selfscaling];
                }
            }
        }
            break;
        caseSRSlimeStateShortening:
        {
            _toPoint =CGPointMake((_toPoint.x - _startPoint.x)*0.8 + _startPoint.x,
                                       (_toPoint.y -_startPoint.y)*0.8 + _startPoint.y);
            float p =distansBetween(_startPoint,_toPoint) /_viscous;
            float percent =1 -p;
            float r =_radius * p;
           
            if (p >0.01) {
                CGFloat startRadius = r * (kStartTo + (1-kStartTo)*percent);
                CGContextRef context =UIGraphicsGetCurrentContext();
               
                CGFloat endRadius = r * (kEndTo + (1-kEndTo)*percent) * (1+percent /2);
                UIBezierPath *path = [selfbodyPath:startRadius
                                                end:endRadius
                                            percent:percent];
                [selfsetContext:contextpath:path];
                CGContextDrawPath(context,kCGPathFillStroke);
            }else {
                self.hidden =YES;
                _state =SRSlimeStateMiss;
            }
        }
            break;
        default:
            break;
    }
}


QQ去除未读状态的动画


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