[英]How to draw a dash line border for NSView
In my custom view, i have code as below: 在我的自定义视图中,我的代码如下:
- (void)drawRect:(NSRect)dirtyRect {
[super drawRect:dirtyRect];
//Drawing code here.
[self setWantsLayer: YES];
[self.layer setBorderWidth: 1];
[self.layer setBorderColor:[NSColor colorWithRed:205/255.0 green:211/255.0 blue:232/255.0 alpha:1.0].CGColor];
[self.layer setCornerRadius: 10];
}
This is OK to set border line and color for my NSView, but i want to set a dash line, anyone know how to do this? 可以为我的NSView设置边框线和颜色,但是我想设置虚线,有人知道该怎么做吗? And i tried some codes from the web search, but it doens't draw a border at all. 我从网络搜索中尝试了一些代码,但它根本没有画出边界。
- (void)drawRect:(NSRect)dirtyRect {
[super drawRect:dirtyRect];
// Drawing code here.
CGFloat dashPattern[] = {10,4}; //make your pattern here
NSBezierPath *textViewSurround = [NSBezierPath bezierPathWithRoundedRect:self.frame xRadius:10 yRadius:10];
[textViewSurround setLineWidth:2.0f];
[textViewSurround setLineDash:dashPattern count:2 phase:0];
[[NSColor colorWithRed:205/255.0 green:211/255.0 blue:232/255.0 alpha:1.0] set];
[textViewSurround stroke];
}
here is a complete example using a subclass of NSView in Swift 3: 这是在Swift 3中使用NSView子类的完整示例:
class BorderedView: NSView {
override func draw(_ dirtyRect: NSRect) {
super.draw(dirtyRect)
// dash customization parameters
let dashHeight: CGFloat = 3
let dashLength: CGFloat = 10
let dashColor: NSColor = .red
// setup the context
let currentContext = NSGraphicsContext.current()!.cgContext
currentContext.setLineWidth(dashHeight)
currentContext.setLineDash(phase: 0, lengths: [dashLength])
currentContext.setStrokeColor(dashColor.cgColor)
// draw the dashed path
currentContext.addRect(bounds.insetBy(dx: dashHeight, dy: dashHeight))
currentContext.strokePath()
}
}
You can do this through CGContext Here is an answer that worked for me: 您可以通过CGContext做到这一点。这是对我有用的答案:
how to make dashed line moveable 如何使虚线移动
And my result: 我的结果是:
In case you want to setup line border with CAShapeLayer
(Swift 4.2): 如果要使用CAShapeLayer
(Swift 4.2)设置线边界:
class StrokeWithDashedLineView: NSView {
private let shapeLayer = CAShapeLayer()
private let fillLayer = CALayer()
private let textLabel = NSTextField().autolayoutView()
override init(frame frameRect: NSRect) {
super.init(frame: frameRect)
setupUI()
setupLayout()
}
required init?(coder decoder: NSCoder) {
fatalError()
}
override var intrinsicContentSize: NSSize {
return CGSize(intrinsicHeight: 76)
}
override func layout() {
super.layout()
updateLayers()
}
private func updateLayers() {
layer?.cornerRadius = 0.5 * bounds.height // Making ourselves rounded.
// Stroke Layer
let shapeBounds = CGRect(width: bounds.width - shapeLayer.lineWidth, height: bounds.height - shapeLayer.lineWidth)
let shapeRadius = 0.5 * shapeBounds.height
let path = CGMutablePath()
path.addRoundedRect(in: shapeBounds, cornerWidth: shapeRadius, cornerHeight: shapeRadius)
shapeLayer.path = path
shapeLayer.bounds = shapeBounds
shapeLayer.position = CGPoint(x: 0.5 * shapeLayer.lineWidth, y: 0.5 * shapeLayer.lineWidth)
// Fill Layer
let fillBounds = CGRect(width: bounds.width - 2 * shapeLayer.lineWidth, height: bounds.height - 2 * shapeLayer.lineWidth)
fillLayer.cornerRadius = 0.5 * fillBounds.height
fillLayer.bounds = fillBounds
fillLayer.position = CGPoint(x: shapeLayer.lineWidth, y: shapeLayer.lineWidth)
}
private func setupUI() {
wantsLayer = true
layer?.masksToBounds = true
shapeLayer.lineWidth = 3
shapeLayer.strokeColor = NSColor.red.cgColor
shapeLayer.fillColor = nil
shapeLayer.lineDashPattern = [11.2, 11.2]
shapeLayer.lineCap = .round
shapeLayer.anchorPoint = .zero
fillLayer.backgroundColor = NSColor.yellow.cgColor
fillLayer.anchorPoint = .zero
layer?.addSublayer(shapeLayer)
layer?.addSublayer(fillLayer)
addSubview(textLabel)
textLabel.text = "Drag Xib or Storyboard files onto\nthis window to open them"
textLabel.alignment = .center
textLabel.textColor = .black
textLabel.font = NSFont.semibold(size: 13)
textLabel.isEditable = false
textLabel.drawsBackground = false
textLabel.isBezeled = false
}
private func setupLayout() {
textLabel.centerXAnchor.constraint(equalTo: centerXAnchor).activate()
textLabel.centerYAnchor.constraint(equalTo: centerYAnchor).activate()
}
}
Result: 结果:
You can do this like, 你可以这样
[yourView.layer setBorderWidth:5.0];
[yourView.layer setBorderColor:[[UIColor colorWithPatternImage:[UIImage imageNamed:@"DotedImage.png"]] CGColor]];
Add dashed image in project and import QuartzCore/QuartzCore.h
in project, 在项目中添加虚线图像,然后在项目中导入QuartzCore/QuartzCore.h
,
#import <QuartzCore/QuartzCore.h>
Update : 更新:
Image size and View size should be same. 图像尺寸和视图尺寸应相同。
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