问题
I have some NSImageView in my Mac App where the user can drag'n drop objects like .png or .pdf, to store them into User Shared Defaults, that works fine.
I would now like to set an action for when user double click on these NSImageView, but it seems to be a little bit difficult (I had no trouble for NSTableView, but 'setDoubleAction' is not available for NSImage, and tons of answers (here or with google) concerning NSImageView's actions point to making a NSButton instead of NSImageView, so that doesn't help)
Here is part of my AppDelegate.h:
@interface AppDelegate : NSObject <NSApplicationDelegate>{
(...)
@property (assign) IBOutlet NSImageView *iconeStatus;
(...)
@end
and here is part of my AppDelegate.m:
#import "AppDelegate.h"
@implementation AppDelegate
(...)
@synthesize iconeStatus = _iconeStatus;
(...)
- (void)awakeFromNib {
(...)
[_iconeStatus setTarget:self];
[_iconeStatus setAction:@selector(doubleClick:)];
(...)
}
(...)
- (void)doubleClick:(id)object {
//make sound if that works ...
[[NSSound soundNamed:@"Basso"] play];
}
But that doesn't work.
Can anyone tell me what's the easiest way to do this ?
回答1:
You need to subclass NSImageView and add the following method to your subclass's implementation:
- (void)mouseDown:(NSEvent *)theEvent
{
NSInteger clickCount = [theEvent clickCount];
if (clickCount > 1) {
// User at least double clicked in image view
}
}
回答2:
Code for Swift 4. Again the NSImageView is subclassed and the mouseDown function is overridden.
class MyImageView: NSImageView {
override func mouseDown(with event: NSEvent) {
let clickCount: Int = event.clickCount
if clickCount > 1 {
// User at least double clicked in image view
}
}
}
回答3:
Another solution using extension
:
extension NSImageView {
override open func mouseDown(with event: NSEvent) {
// your code here
}
}
Although this will add that functionality to every NSImageView, so perhaps that's not what you're looking for.
来源:https://stackoverflow.com/questions/13961356/nsimageview-double-click-action