Swift NSTextField 文本消失
Swift NSTextField text disappears
这个问题可能存在于 objective-c 中 6 岁的 post 身上。我没有找到最近有效的答案或问题,也没有找到写在 Swift.
中的答案或问题
我正在使用情节提要,并且我已经对 NSTextField
进行了子类化。出于某种原因,当我单击该字段时,会显示占位符,当我输入文本并单击退出时,文本会消失。文本实际上在那里,因为当我再次单击时,输入的文本仍然存在。图层覆盖文本值似乎是某种类型的渲染问题?很奇怪。我正在使用 NSTrackingArea
并添加 CALayer
。
这是发生的情况的屏幕截图:
这是我的代码:
class NowTextField: NSTextField {
override func draw(_ dirtyRect: NSRect) {
super.draw(dirtyRect)
// required nonsense
let textFieldLayer = CALayer()
let textFieldRect = NSRect(x: 0, y: 0, width: 120, height: 32)
let textFieldTrackingArea = NSTrackingArea.init(rect: textFieldRect, options: [NSTrackingAreaOptions.activeInActiveApp, NSTrackingAreaOptions.mouseEnteredAndExited], owner: self, userInfo: nil)
self.wantsLayer = true
self.layer = textFieldLayer
self.addTrackingArea(textFieldTrackingArea)
// styling
self.textColor = NSColor.darkGray
self.layer?.cornerRadius = 4
self.layer?.backgroundColor = NSColor.white.cgColor
self.layer?.borderColor = NSColor.lightGray.cgColor
self.layer?.borderWidth = 2
self.drawsBackground = false
}
override func mouseEntered(with event: NSEvent) {
self.textColor = NSColor.darkGray
self.layer?.cornerRadius = 4
self.layer?.backgroundColor = NSColor.white.cgColor
self.layer?.borderColor = NSColor.highlightBlue.cgColor
self.layer?.borderWidth = 2
self.drawsBackground = false
}
override func mouseExited(with event: NSEvent) {
self.textColor = NSColor.darkGray
self.layer?.cornerRadius = 4
self.layer?.backgroundColor = NSColor.white.cgColor
self.layer?.borderColor = NSColor.lightGray.cgColor
self.layer?.borderWidth = 2
self.drawsBackground = false
}
}
我找到了答案。我删除了 let textFieldLayer = CALayer()
和 self.layer = textFieldLayer
,因为它们似乎在文本字段的顶部添加了一个不必要的层。这是我的工作版本的完整代码:
class NowTextField: NSTextField {
override func draw(_ dirtyRect: NSRect) {
super.draw(dirtyRect)
// required nonsense
let textFieldRect = NSRect(x: 0, y: 0, width: 120, height: 32)
let textFieldTrackingArea = NSTrackingArea.init(rect: textFieldRect, options: [NSTrackingAreaOptions.activeInActiveApp, NSTrackingAreaOptions.mouseEnteredAndExited], owner: self, userInfo: nil)
self.wantsLayer = true
self.addTrackingArea(textFieldTrackingArea)
// styling
self.textColor = NSColor.darkGray
self.layer?.cornerRadius = 4
self.layer?.backgroundColor = NSColor.white.cgColor
self.layer?.borderColor = NSColor.lightGray.cgColor
self.layer?.borderWidth = 2
self.drawsBackground = false
}
override func mouseEntered(with event: NSEvent) {
self.textColor = NSColor.darkGray
self.layer?.cornerRadius = 4
self.layer?.backgroundColor = NSColor.white.cgColor
self.layer?.borderColor = NSColor.highlightBlue.cgColor
self.layer?.borderWidth = 2
self.drawsBackground = false
}
override func mouseExited(with event: NSEvent) {
self.textColor = NSColor.darkGray
self.layer?.cornerRadius = 4
self.layer?.backgroundColor = NSColor.white.cgColor
self.layer?.borderColor = NSColor.lightGray.cgColor
self.layer?.borderWidth = 2
self.drawsBackground = false
}
}
这个问题可能存在于 objective-c 中 6 岁的 post 身上。我没有找到最近有效的答案或问题,也没有找到写在 Swift.
中的答案或问题我正在使用情节提要,并且我已经对 NSTextField
进行了子类化。出于某种原因,当我单击该字段时,会显示占位符,当我输入文本并单击退出时,文本会消失。文本实际上在那里,因为当我再次单击时,输入的文本仍然存在。图层覆盖文本值似乎是某种类型的渲染问题?很奇怪。我正在使用 NSTrackingArea
并添加 CALayer
。
这是发生的情况的屏幕截图:
这是我的代码:
class NowTextField: NSTextField {
override func draw(_ dirtyRect: NSRect) {
super.draw(dirtyRect)
// required nonsense
let textFieldLayer = CALayer()
let textFieldRect = NSRect(x: 0, y: 0, width: 120, height: 32)
let textFieldTrackingArea = NSTrackingArea.init(rect: textFieldRect, options: [NSTrackingAreaOptions.activeInActiveApp, NSTrackingAreaOptions.mouseEnteredAndExited], owner: self, userInfo: nil)
self.wantsLayer = true
self.layer = textFieldLayer
self.addTrackingArea(textFieldTrackingArea)
// styling
self.textColor = NSColor.darkGray
self.layer?.cornerRadius = 4
self.layer?.backgroundColor = NSColor.white.cgColor
self.layer?.borderColor = NSColor.lightGray.cgColor
self.layer?.borderWidth = 2
self.drawsBackground = false
}
override func mouseEntered(with event: NSEvent) {
self.textColor = NSColor.darkGray
self.layer?.cornerRadius = 4
self.layer?.backgroundColor = NSColor.white.cgColor
self.layer?.borderColor = NSColor.highlightBlue.cgColor
self.layer?.borderWidth = 2
self.drawsBackground = false
}
override func mouseExited(with event: NSEvent) {
self.textColor = NSColor.darkGray
self.layer?.cornerRadius = 4
self.layer?.backgroundColor = NSColor.white.cgColor
self.layer?.borderColor = NSColor.lightGray.cgColor
self.layer?.borderWidth = 2
self.drawsBackground = false
}
}
我找到了答案。我删除了 let textFieldLayer = CALayer()
和 self.layer = textFieldLayer
,因为它们似乎在文本字段的顶部添加了一个不必要的层。这是我的工作版本的完整代码:
class NowTextField: NSTextField {
override func draw(_ dirtyRect: NSRect) {
super.draw(dirtyRect)
// required nonsense
let textFieldRect = NSRect(x: 0, y: 0, width: 120, height: 32)
let textFieldTrackingArea = NSTrackingArea.init(rect: textFieldRect, options: [NSTrackingAreaOptions.activeInActiveApp, NSTrackingAreaOptions.mouseEnteredAndExited], owner: self, userInfo: nil)
self.wantsLayer = true
self.addTrackingArea(textFieldTrackingArea)
// styling
self.textColor = NSColor.darkGray
self.layer?.cornerRadius = 4
self.layer?.backgroundColor = NSColor.white.cgColor
self.layer?.borderColor = NSColor.lightGray.cgColor
self.layer?.borderWidth = 2
self.drawsBackground = false
}
override func mouseEntered(with event: NSEvent) {
self.textColor = NSColor.darkGray
self.layer?.cornerRadius = 4
self.layer?.backgroundColor = NSColor.white.cgColor
self.layer?.borderColor = NSColor.highlightBlue.cgColor
self.layer?.borderWidth = 2
self.drawsBackground = false
}
override func mouseExited(with event: NSEvent) {
self.textColor = NSColor.darkGray
self.layer?.cornerRadius = 4
self.layer?.backgroundColor = NSColor.white.cgColor
self.layer?.borderColor = NSColor.lightGray.cgColor
self.layer?.borderWidth = 2
self.drawsBackground = false
}
}