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你好全部 - 我有一個NSView子類,我在mouseDown上以編程方式移動。哪個有效,但有副作用:可可的NSView得到瘋狂的mouseDown事件?
- 我點擊子視圖。子視圖移開[GOOD]
- 我等了一會兒。我不會移動我的鼠標。由於子視圖已移動,它不再位於我的光標下方。
- 我再次點擊鼠標。
- 我期望下層窗口拿到mouseDown事件(因爲子視圖不再是我的光標所在),但我的子視圖以某種方式得到這個事件[奇]
- MouseDown事件清楚地表明,點擊是我的子類[ODD]的範圍之外
- MouseDown事件也清楚地表明,點擊次數已經增加,儘管我已經等了鼠標之間幾秒鐘點擊[奇]
...有一個解釋我所看到的。這裏是我的代碼 - 只需創建一個名爲「OddMouse」一個新的Cocoa應用程序的項目,並複製以下到OddMouseAppDelegate.h文件:
#import <Cocoa/Cocoa.h>
@interface OddMouseAppDelegate : NSObject <NSApplicationDelegate> {
NSWindow *window;
}
@property (assign) IBOutlet NSWindow *window;
@end
@interface OddView : NSView {
}
@end
...和下面進入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,再運行,然後見證! FWIW,這裏就是我在控制檯中看到:
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