可可中的可拖動NSTextField

Question

我正在開發打印發票的應用程序。 我編寫以下代碼以使NSTextFields可拖動並與發票字段匹配。 它可以工作，但是當調整窗口大小時，NSTextField返回初始位置。 我能做什么？

@interface DragTextField : NSTextField <NSWindowDelegate>
@property (readwrite) NSPoint location;
@end


@implementation DragTextField
@synthesize location;

- (id)initWithFrame:(NSRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
    }

    return self;
}

- (void)drawRect:(NSRect)dirtyRect
{
    [super drawRect:dirtyRect];

}

- (BOOL) acceptsFirstMouse:(NSEvent *)theEvent
{
    return YES;
}

- (void)mouseDown:(NSEvent *)theEvent
{
    location = [theEvent locationInWindow];
    self.location = [[self superview] convertPoint:[theEvent locationInWindow] fromView:nil];
}

- (void)mouseDragged:(NSEvent *)theEvent
{

    NSPoint newDragLocation = [[self superview] convertPoint:[theEvent locationInWindow] fromView:nil];
    NSPoint thisOrigin = [self frame].origin;
    thisOrigin.x += (-self.location.x + newDragLocation.x);
    thisOrigin.y += (-self.location.y + newDragLocation.y);
    [self setFrameOrigin:thisOrigin];
    self.location = newDragLocation;
}

- (void)mouseUp:(NSEvent *)theEvent {

    [self setNeedsDisplay:YES];
}

Answer 1

每當使用委托函數調整窗口大小時，都必須重新定位文本字段。

- (void)windowDidResize:(NSNotification *)notification{ 
//Change the position of your textfield depending on the window size
}