我想使用 Interface Builder 使用的 NSMatrix 方法创建一组单选按钮,但在代码中。矩阵使用自动布局进行布局。我大部分时间都在工作,除了在运行时添加新选项时。
在下面的示例中,单击 Append Item 几次就可以正常工作,然后矩阵开始从靠近顶部的窗口中移出(至少我认为它在顶部被剪裁了)。如果在添加一堆项目后最大化此窗口,则窗口将保持相同的高度,并且所有项目将被裁剪到每个像素高,这是非常不受欢迎的事情:)
在我的真实程序(不是下面的这个测试)中,它工作得很好,但是如果我动态添加一个选项,在一定数量的项目(最初是 5 个)之后,选项将非常轻微地剪辑,出现轻微的挤压或挤压。添加另一个选项会恢复此状态,直到命中下一个幻数。
这是怎么回事?我正在 OS X Yosemite 上对此进行测试。谢谢。
// 17 august 2015
import Cocoa
var keepAliveMainwin: NSWindow? = nil
var matrix: NSMatrix? = nil
class ButtonHandler : NSObject {
@IBAction func onClicked(sender: AnyObject) {
var lastRow = matrix!.numberOfRows
matrix!.renewRows(lastRow + 1, columns: 1)
var cell = matrix!.cellAtRow(lastRow, column: 0) as! NSButtonCell
cell.title = "New Item"
matrix!.sizeToCells()
}
}
var buttonHandler: ButtonHandler = ButtonHandler()
func appLaunched() {
var mainwin = NSWindow(
contentRect: NSMakeRect(0, 0, 320, 240),
styleMask: (NSTitledWindowMask | NSClosableWindowMask | NSMiniaturizableWindowMask | NSResizableWindowMask),
backing: NSBackingStoreType.Buffered,
defer: true)
var contentView = mainwin.contentView as! NSView
var prototype = NSButtonCell()
prototype.setButtonType(NSButtonType.RadioButton)
prototype.font = NSFont.systemFontOfSize(NSFont.systemFontSizeForControlSize(NSControlSize.RegularControlSize))
matrix = NSMatrix(frame: NSZeroRect,
mode: NSMatrixMode.RadioModeMatrix,
prototype: prototype,
numberOfRows: 0,
numberOfColumns: 0)
matrix!.allowsEmptySelection = false
matrix!.selectionByRect = true
matrix!.intercellSpacing = NSMakeSize(4, 2)
matrix!.autorecalculatesCellSize = true
matrix!.drawsBackground = false
matrix!.drawsCellBackground = false
matrix!.autosizesCells = true
matrix!.translatesAutoresizingMaskIntoConstraints = false
contentView.addSubview(matrix!)
var button = NSButton(frame: NSZeroRect)
button.title = "Append Item"
button.setButtonType(NSButtonType.MomentaryPushInButton)
button.bordered = true
button.bezelStyle = NSBezelStyle.RoundedBezelStyle
button.font = NSFont.systemFontOfSize(NSFont.systemFontSizeForControlSize(NSControlSize.RegularControlSize))
button.translatesAutoresizingMaskIntoConstraints = false
contentView.addSubview(button)
button.target = buttonHandler
button.action = "onClicked:"
var views: [String: NSView]
views = [
"button": button,
"matrix": matrix!,
]
addConstraints(contentView, "V:|-[matrix]-[button]-|", views)
addConstraints(contentView, "H:|-[matrix]-|", views)
addConstraints(contentView, "H:|-[button]-|", views)
mainwin.cascadeTopLeftFromPoint(NSMakePoint(20, 20))
mainwin.makeKeyAndOrderFront(mainwin)
keepAliveMainwin = mainwin
}
func addConstraints(view: NSView, constraint: String, views: [String: NSView]) {
var constraints = NSLayoutConstraint.constraintsWithVisualFormat(
constraint,
options: NSLayoutFormatOptions(0),
metrics: nil,
views: views)
view.addConstraints(constraints)
}
class appDelegate : NSObject, NSApplicationDelegate {
func applicationDidFinishLaunching(note: NSNotification) {
appLaunched()
}
func applicationShouldTerminateAfterLastWindowClosed(app: NSApplication) -> Bool {
return true
}
}
func main() {
var app = NSApplication.sharedApplication()
app.setActivationPolicy(NSApplicationActivationPolicy.Regular)
// NSApplication.delegate is weak; if we don't use the temporary variable, the delegate will die before it's used
var delegate = appDelegate()
app.delegate = delegate
app.run()
}
main()