NSButton NSTrackingArea - 跟蹤不起作用

我正試圖完成鼠標懸停在事件上的按鈕。所以我分類NSButton，其中是NSTrackingArea和方法- (void)mouseEntered:(NSEvent *)event和 - (void)updateTrackingAreas。按鈕的NSButton NSTrackingArea - 跟蹤不起作用

創建看起來如此（這是在循環，所以我用數組收集）：

 CalendarTile *button = [[CalendarTile alloc] init]; 

     [button setFrame:CGRectMake(point_x, point_y, button_frame_width, button_frame_height)]; 
     [button setBordered:NO]; 
     [button setBezelStyle:NSRegularSquareBezelStyle]; 
     [button setButtonType:NSMomentaryChangeButton]; 
     [button setFont:[NSFont fontWithName:@"Avenir Next" size:40]]; 
     [button setAlignment:NSCenterTextAlignment]; 

     [button setTitle:[NSString stringWithFormat:@"%i", i]]; 
     [button setTextColor:[NSColor colorWithCalibratedRed:(float)62/255 green:(float)62/255 blue:(float)62/255 alpha:1.0]]; 

     [arrayWithButtons addObject:button]; 

     ... 

     for (CalendarTile *btn in arrayWithButton) { 
     [self addSubview:btn]; 
     }

這是一個子類 - CalendarTile.m：

@implementation CalendarTile 
- (void)updateTrackingAreas 
{ 
    [super updateTrackingAreas]; 

    if (trackingArea) 
    { 
     [self removeTrackingArea:trackingArea]; 
    } 

    NSTrackingAreaOptions options = NSTrackingInVisibleRect | NSTrackingMouseEnteredAndExited | NSTrackingActiveInKeyWindow; 
    trackingArea = [[NSTrackingArea alloc] initWithRect:NSZeroRect options:options owner:self userInfo:nil]; 
    [self addTrackingArea:trackingArea]; 
} 

- (void)mouseEntered:(NSEvent *)event 
{ 
    [self setImage:[NSImage imageNamed:@"highlight.png"]]; 
    NSLog(@"HIGHLIGHT"); 
}

應該說，在當鼠標懸停時記錄「HIGHLIGHT」 - 很遺憾沒有。

你能幫我嗎？我錯了什麼？

來源

2012-09-15 Konrad Kolasa

你確定你想用NSZeroRect初始化跟蹤區嗎？ – TheAmateurProgrammer

好吧，我根據這個問題解決了我的問題： http://stackoverflow.com/questions/7889419/cocoa-button-rollovers-with-mouseentered-and-mouseexited –

嘗試

trackingArea = [[NSTrackingArea alloc] initWithRect:NSZeroRect options:options owner:self userInfo:nil];

，而不是

NSTrackingAreaOptions options = NSTrackingMouseEnteredAndExited | NSTrackingActiveAlways; 
    trackingArea = [[NSTrackingArea alloc] initWithRect:self.frame options:options owner:self userInfo:nil];

來源

2012-10-26 09:40:46

我不認爲設置NSZeroRect將修復問題。通常它被設置爲'self.bounds'。 –

這裏是我創造，爲我的工作完美...

第1步：創建跟蹤區域的按鈕

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];

步驟：2實施以下方法

- (void)mouseEntered:(NSEvent *)theEvent{ 
NSLog(@"entered"); 
[[myButton cell] setBackgroundColor:[NSColor blueColor]]; 


} 

- (void)mouseExited:(NSEvent *)theEvent{ 
[[myButton cell] setBackgroundColor:[NSColor redColor]]; 
NSLog(@"exited"); 

}

來源

2014-02-26 18:48:07 VSN

NSButton NSTrackingArea - 跟蹤不起作用

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