更改特定视图的 NSCursor
我试图在光标经过视图时更改光标，但我想我没有正确编码它，因为它不起作用。
我有一个 appcontroller 类，在它的 .m 文件中我有这个
- (void) awakeFromNib {
//set up the cursors
NSCursor * handCursor = [NSCursor closedHandCursor];
//make a box
Box* newBox = [[Box alloc] initWithFrame:NSMakeRect(10.0, 10.0, 100.0, 100.0)];
//set up the rect for the cursor change
NSRect rectForCursor = [newBox frame];
[newBox addCursorRect:rectForCursor cursor:handCursor];
//add box to main win
[[mainWin contentView] addSubview:newBox];
}
I'm trying to change the cursor when it passes over a view but I guess I am not coding it correctly as it is not working.
I have an appcontroller class and in it's .m file I have this
- (void) awakeFromNib {
//set up the cursors
NSCursor * handCursor = [NSCursor closedHandCursor];
//make a box
Box* newBox = [[Box alloc] initWithFrame:NSMakeRect(10.0, 10.0, 100.0, 100.0)];
//set up the rect for the cursor change
NSRect rectForCursor = [newBox frame];
[newBox addCursorRect:rectForCursor cursor:handCursor];
//add box to main win
[[mainWin contentView] addSubview:newBox];
}
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从 awakeFromNib 中调用 addCursorRect: 不起作用。它必须从resetCursorRects:的重写中调用，这可能会在某个时刻被调用并破坏您设置的矩形。
Calling addCursorRect: from within awakeFromNib won't work. It must be called from within an override of resetCursorRects:, which is probably getting invoked at some point and clobbering the rect your set up.
您忘记调用
[handCursor setOnMouseEntered:YES]。否则，NSCursor将忽略它发送的mouseEntered:事件。You've forgotten to call
[handCursor setOnMouseEntered:YES]. Otherwise,NSCursorwill ignore themouseEntered:event it is sent.