在尝试在自定义UIControl子类中绘制几个CAShapeLayer时,我遇到了一个奇怪的问题。我确信它是显而易见的,但是24小时后,我无法使它发挥作用。
我这样做:
// .h
@interface IntercomButton : UIControl
@end
// .m
@interface IntercomButton()
@property (nonatomic) CAShapeLayer *outerCircle, *innerCircle;
@end
@implementation IntercomButton
- (instancetype)initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
if (self) {
_innerCircle = [CAShapeLayer layer];
_outerCircle = [CAShapeLayer layer];
_innerCircle.frame = frame;
_outerCircle.frame = frame;
[self.layer addSublayer:_innerCircle];
[self.layer addSublayer:_outerCircle];
}
return self;
}
- (void)layoutSubviews {
_innerCircle.frame = self.frame;
_innerCircle.strokeColor = NULL;
_innerCircle.fillColor = [UIColor colorWithRed:0.377 green:0.664 blue:0.894 alpha:1.000].CGColor;
_innerCircle.path = [UIBezierPath bezierPathWithOvalInRect:CGRectInset(self.frame, 12, 12)].CGPath;
//_innerCircle.rasterizationScale = 2.0 * [UIScreen mainScreen].scale;
//_innerCircle.shouldRasterize = YES;
//[self.layer addSublayer:_innerCircle];
_outerCircle.frame = self.frame;
_outerCircle.lineWidth = 4.0f;
_outerCircle.strokeColor = [UIColor colorWithRed:0.377 green:0.664 blue:0.894 alpha:1.000].CGColor;
_outerCircle.fillColor = NULL;
_outerCircle.path = [UIBezierPath bezierPathWithOvalInRect:CGRectInset(self.frame, 6, 6)].CGPath;
//_outerCircle.rasterizationScale = 2.0 * [UIScreen mainScreen].scale;
//_outerCircle.shouldRasterize = YES;
//[self.layer addSublayer:_outerCircle];
}
@end
它是在另一个视图中创建的视图(它在UITableViewCell中,而不是我觉得它很重要,但仍然......)
IntercomButton *intercomButton = [[IntercomButton alloc] initWithFrame:btn.frame];
intercomButton.backgroundColor = [UIColor clearColor];
[detailView addSubview:intercomButton];
UIControl视图正好被添加,因为如果我更改背景颜色,它会显示。
另外,如果我使用drawRect绘制,它可以工作:
- (void)drawRect:(CGRect)rect {
[super drawRect:rect];
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSetFillColorWithColor(context, [UIColor colorWithRed:0.377 green:0.664 blue:0.894 alpha:1.000].CGColor);
CGContextFillEllipseInRect (context, CGRectInset(rect, 12, 12));
CGContextFillPath(context);
CGContextSetLineWidth(context, 3.0f);
CGContextSetStrokeColorWithColor(context, [UIColor colorWithRed:0.377 green:0.664 blue:0.894 alpha:1.000].CGColor);
CGContextStrokeEllipseInRect(context, CGRectInset(rect, 8, 8));
CGContextStrokePath(context);
}
问题是我需要为它设置动画,所以我需要使用CAShapeLayers。 我想要绘制的内容应该是这样的(这是使用drawRect看起来的样子:)
答案 0 :(得分:0)
好吧,我会被诅咒,问题在于做什么
CGRectInset(self.frame, X, X)
我应该做什么
CGRectInset(self.bounds, X, X)
所以层位于视图框外的位置。
正如我所说,它结束了显而易见的事情。