我正在为自定义呈现创建自定义NSButtonCell
。
现在,我希望根据鼠标是否在按钮上方有不同的方面。我怎样才能获得这些信息?
谢谢和问候,
答案 0 :(得分:30)
这是我为我创造并完美地工作的......
步骤1:创建带跟踪区域的按钮
NSButton *myButton = [[NSButton alloc] initWithFrame:NSMakeRect(100, 7, 100, 50)];
[myButton setTitle:@"sample"];
[self.window.contentView addSubview:myButton];
// Insert code here to initialize your application
NSTrackingArea* trackingArea = [[NSTrackingArea alloc]
initWithRect:[myButton bounds]
options:NSTrackingMouseEnteredAndExited | NSTrackingActiveAlways
owner:self userInfo:nil];
[myButton addTrackingArea:trackingArea];
步骤:2实施以下方法
- (void)mouseEntered:(NSEvent *)theEvent{
NSLog(@"entered");
[[myButton cell] setBackgroundColor:[NSColor blueColor]];
}
- (void)mouseExited:(NSEvent *)theEvent{
[[myButton cell] setBackgroundColor:[NSColor redColor]];
NSLog(@"exited");
}
答案 1 :(得分:10)
斯威夫特3:
使用代码创建按钮或只使用它的@IBOutlet。 然后定义按钮的鼠标悬停跟踪区域(悬停):
let area = NSTrackingArea.init(rect: yourButtonName.bounds,
options: [.mouseEnteredAndExited, .activeAlways],
owner: self,
userInfo: nil)
yourButtonName.addTrackingArea(area)
然后覆盖mouseEntered和mouseExited,在这些函数中设置您想要更改的内容(按钮颜色,按钮图像,按钮文本,..):
override func mouseEntered(with event: NSEvent) {
print("Entered: \(event)")
}
override func mouseExited(with event: NSEvent) {
print("Exited: \(event)")
}
如果您有多个按钮(每个按钮都添加了跟踪区域)并且您需要确定哪个按钮触发了mouseEntered事件,您可以为此添加一些userInfo信息,而不是:
userInfo: nil
在userInfo中为每个按钮添加自定义按钮名称,例如:
userInfo: ["btnName": "yourButtonName"]
然后你可以在mouseEntered和mouseExited函数中编写一个switch-case或if语句,如下所示:
override func mouseEntered(with event: NSEvent) {
// Identify which button triggered the mouseEntered event
if let buttonName = event.trackingArea?.userInfo?.values.first as? String {
switch (buttonName) {
case "yourButtonName":
//do whatever you want for this button..
case "anotherButtonName":
//do whatever you want for this button..
default:
print("The given button name: \"\(buttonName)\" is unknown!")
}
}
}
答案 2 :(得分:9)
您需要对NSButton类进行子类化(甚至更好的是NSButtonCell类)。 正如贾斯汀所说,如果你把这两种方法
- (void)mouseEntered:(NSEvent *)theEvent;
- (void)mouseExited:(NSEvent *)theEvent;
当鼠标进入和退出该区域时,应该调用它们。您可能还需要重新创建跟踪区域,请查看此处:
- (void)updateTrackingAreas
对于淡入和淡出效果,我使用动画师和alpha值进行游戏,例如:
[self animator]setAlphaValue:0.5];
答案 3 :(得分:3)
一个很好的起点,在NSResponder中声明:
- (void)mouseEntered:(NSEvent *)theEvent;
- (void)mouseExited:(NSEvent *)theEvent;
具体来说,按钮单元的容器(不是单元本身)是NSResponder。
答案 4 :(得分:0)
对于那些喜欢子类化的人,您也可以制作自己的GrabAudio gr = new GrabAudio(0, 1024, mp.getAudioSessionId());
gr.start();
byte[] b = gr.getRawData();
gr.release();
Log.i("test11", "b:" + Arrays.toString(b));
并在其中分配NSButton
。
由于 Joey Zhou :https://github.com/Swift-Kit/JZHoverNSButton
,这是一种非常简单而优雅的方法它是用 Swift 2 编写的,但是XCode会自动将它用 Swift 3-4 进行翻译。
希望它可以帮助某人
答案 5 :(得分:0)
这是一个简单的代码,可以跟踪某些控件(图像,标签等)上的mouse enter
和mouse exit
事件:
@IBOutlet weak var myImage: NSImageView!
@IBOutlet weak var myLabel: NSTextField!
override func viewDidLoad() {
super.viewDidLoad()
let area1 = myTrakingArea(control: self.myImage)
let area2 = myTrakingArea(control: self.myLabel)
self.myImage.addTrackingArea(area1)
self.myLabel.addTrackingArea(area2)
}
func myTrakingArea(control: NSControl) -> NSTrackingArea {
return NSTrackingArea.init(rect: control.bounds,
options: [.mouseEnteredAndExited, .activeAlways],
owner: control,
userInfo: nil)
}
override func mouseEntered(with event: NSEvent) {
if let owner = event.trackingArea?.owner as? NSControl {
let id : String = owner.identifier!.rawValue
switch id {
case self.myLabel.identifier!.rawValue:
print("Entered Quit Label")
case self.myImage.identifier!.rawValue:
print("Entered Quit Image")
default:
print("Entered ???")
}
}
}
override func mouseExited(with event: NSEvent) {
if let owner = event.trackingArea?.owner as? NSControl {
let id : String = owner.identifier!.rawValue
switch id {
case self.myLabel.identifier!.rawValue:
print("Exited Quit Label")
case self.myImage.identifier!.rawValue:
print("Exited Quit Image")
default:
print("Exited ???")
}
}
}
答案 6 :(得分:0)
带有回调的Swift 5版本,超级易于使用:
final class HoverButton: NSButton {
private let callback: (HoverButton, Bool) -> Void
init(callback: @escaping (HoverButton, Bool) -> Void) {
self.callback = callback
super.init(frame: .zero)
let area = NSTrackingArea(rect: bounds, options: [.mouseEnteredAndExited, .activeAlways, .inVisibleRect], owner: self, userInfo: nil)
addTrackingArea(area)
}
@available(*, unavailable)
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override func mouseEntered(with event: NSEvent) {
super.mouseEntered(with: event)
callback(self, true)
}
override func mouseExited(with event: NSEvent) {
super.mouseExited(with: event)
callback(self, false)
}
}
用法:
let button = HoverButton { button, isHovered in
button.animator().alphaValue = isHovered ? 1 : 0.5
}