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你好全部 - 我有一个NSView子类,我在mouseDown上以编程方式移动。哪个有效,但有副作用:可可的NSView得到疯狂的mouseDown事件?
- 我点击子视图。子视图移开[GOOD]
- 我等了一会儿。我不会移动我的鼠标。由于子视图已移动,它不再位于我的光标下方。
- 我再次点击鼠标。
- 我期望下层窗口拿到mouseDown事件(因为子视图不再是我的光标所在),但我的子视图以某种方式得到这个事件[奇]
- MouseDown事件清楚地表明,点击是我的子类[ODD]的范围之外
- MouseDown事件也清楚地表明,点击次数已经增加,尽管我已经等了鼠标之间几秒钟点击[奇]
...有一个解释我所看到的。这里是我的代码 - 只需创建一个名为“OddMouse”一个新的Cocoa应用程序的项目,并复制以下到OddMouseAppDelegate.h文件:
#import <Cocoa/Cocoa.h>
@interface OddMouseAppDelegate : NSObject <NSApplicationDelegate> {
NSWindow *window;
}
@property (assign) IBOutlet NSWindow *window;
@end
@interface OddView : NSView {
}
@end
...和下面进入OddMouseAppDelegate.m文件:
#import "OddMouseAppDelegate.h"
@implementation OddMouseAppDelegate
@synthesize window;
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
[[window contentView] addSubview:[[OddView alloc] init]]; } @end
@implementation OddView
- (id)init {
self = [super initWithFrame:NSMakeRect(100, 100, 100, 100)];
return self;
}
- (void)drawRect:(NSRect)dirtyRect {
NSBezierPath *bz = [NSBezierPath bezierPathWithRoundedRect:[self bounds]
xRadius:9 yRadius:9];
[[NSColor blueColor] set];
[bz fill];
}
- (void)mouseDown:(NSEvent *)event {
NSPoint locationInMyself = [self convertPoint: [event locationInWindow]
fromView: nil];
NSLog(@"MOUSE DOWN COORDS: x=%f y=%f, count=%i",
locationInMyself.x, locationInMyself.y, [event clickCount]);
float newX = [self frame].origin.x+100;
float newY = [self frame].origin.y+100;
[self setFrame:NSMakeRect(newX, newY, 100, 100)];
}
@end
...再建,再运行,然后见证! FWIW,这里就是我在控制台中看到:
10-01-15 11:38:24 PM OddMouse[4583] MOUSE DOWN COORDS: x=48.000000 y=56.000000, count=1
10-01-15 11:38:37 PM OddMouse[4583] MOUSE DOWN COORDS: x=-52.000000 y=-44.000000, count=2
10-01-15 11:38:44 PM OddMouse[4583] MOUSE DOWN COORDS: x=-152.000000 y=-144.000000, count=3
10-01-15 11:38:52 PM OddMouse[4583] MOUSE DOWN COORDS: x=-252.000000 y=-244.000000, count=4
10-01-15 11:39:03 PM OddMouse[4583] MOUSE DOWN COORDS: x=-352.000000 y=-344.000000, count=5