CAShapeLayer 的 frame.origin 和 bounds.size 设置为 0答案

【问题标题】：frame.origin and bounds.size of CAShapeLayer are set to 0CAShapeLayer 的 frame.origin 和 bounds.size 设置为 0
【发布时间】：2015-02-11 06:18:45
【问题描述】：

使用以下代码，我总是得到 shapeLayer.frame.origin.x = 0 shapeLayer.frame.origin.y =0 shapeLayer.bounds.size.width = 0 的值 shapeLayer.bounds.size.height=0 有没有人得到一个想法？谢谢你的回答。

-(void) makeShape {
UIBezierPath * path = [UIBezierPath bezierPath];
[path moveToPoint:CGPointMake(408.000000,230.000000) ];
[path addCurveToPoint:CGPointMake(365.000000,251.000000) controlPoint1:CGPointMake(399.399994,236.000000) controlPoint2:CGPointMake(365.000000,239.000000) ];
[path addCurveToPoint:CGPointMake(309.000000,287.000000) controlPoint1:CGPointMake(353.799988,252.000000) controlPoint2:CGPointMake(309.000000,252.000000) ];
[path addLineToPoint:CGPointMake(236.000000,321.000000) ];
[path addLineToPoint:CGPointMake(207.000000,384.000000) ];
[path addCurveToPoint:CGPointMake(157.000000,416.000000) controlPoint1:CGPointMake(197.000000,388.000000) controlPoint2:CGPointMake(157.000000,390.000000) ];
[path addLineToPoint:CGPointMake(90.000000,489.000000) ];
[path addCurveToPoint:CGPointMake(49.000000,566.000000) controlPoint1:CGPointMake(81.800003,490.000000) controlPoint2:CGPointMake(49.000004,506.000000) ];
[path addCurveToPoint:CGPointMake(19.000000,640.000000) controlPoint1:CGPointMake(35.400002,567.000000) controlPoint2:CGPointMake(18.999998,568.000000) ];
[path addLineToPoint:CGPointMake(365.000000,800.000000) ];
[path addLineToPoint:CGPointMake(415.000000,700.000000) ];
[path  closePath];
CAShapeLayer * shapeLayer = [CAShapeLayer layer];
shapeLayer.strokeColor = [[UIColor blackColor] CGColor];
shapeLayer.fillColor = [UIColor grayColor].CGColor;
shapeLayer.lineWidth = 1.5f;
shapeLayer.lineJoin = kCALineJoinRound;
shapeLayer.path = path.CGPath;
[self.view.layer addSublayer:shapeLayer];
float x= shapeLayer.frame.origin.x;
float y = shapeLayer.frame.origin.y;
float w= shapeLayer.bounds.size.width;
float h = shapeLayer.bounds.size.height;
NSLog(@"Point(%f,%f)",x,y);
NSLog(@"Size(%f,%f)",w,h);
}

【问题讨论】：

标签： ios objective-c uibezierpath cashapelayer cgpath

【解决方案1】：

我想通了。只是用 path.bounds 设置属性边界。

但是当没有设置边界时，这会缩小形状并修改它的位置

【讨论】：

【解决方案2】：

当我使用CAShapeLayer 判断触摸是否在框架中时... 我发现与您的问题相同的问题。

所以我在创建 CAShapeLayer 时使用 Associate 添加框架。

#import <objc/runtime.h>

// To solve CAShapeLayer Frame(0,0,0,0)

@implementation CAShapeLayer (frameCategory)

//http://stackoverflow.com/questions/28447744/frame-origin-and-bounds-size-of-cashapelayer-are-set-to-0

static char kAssociatedObjectKey;

- (void)setFrameValue:(id)frameValue {
    objc_setAssociatedObject(self, &kAssociatedObjectKey, frameValue, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}

- (id)frameValue {
    return objc_getAssociatedObject(self, &kAssociatedObjectKey);
}

【讨论】：