可可nsview更改光标 [英] Cocoa nsview change cursor

问题描述

我尝试更改可可应用程序中的默认光标.我读到了有关此内容的信息，但标准方法对我不起作用.

I tried to change the default cursor in my cocoa application. I read about this but the standard approach isn't working for me.

我尝试将这种方法添加到我的OpenGLView子类中:

I try to add to my OpenGLView subclass this method:

- (void) resetCursorRects
{
    [super resetCursorRects];
    NSCursor * myCur = [[NSCursor alloc] initWithImage:[NSImage imageNamed:@"1.png"] hotSpot:NSMakePoint(8,0)];
    [self addCursorRect: [self bounds]
          cursor: myCur];
    NSLog(@"Reset cursor rect!");

} 

它不起作用.为什么?

推荐答案

您可以通过两种方式进行操作.首先-最简单-是在鼠标进入视图并离开视图时更改光标.

There're two ways you can do it. First - the most simple - is to change the cursor while the mouse enters the view and leaves it.

- (void)mouseEntered:(NSEvent *)event
  {
   [super mouseEntered:event];
   [[NSCursor pointingHandCursor] set];
  }

- (void)mouseExited:(NSEvent *)event
  {
   [super mouseExited:event];
   [[NSCursor arrowCursor] set];
  }

另一种方法是创建跟踪区域(即在awakeFromNib方法中)，并覆盖- (void)cursorUpdate:-方法

Another way is to create tracking area (i.e. in awakeFromNib-method), and override - (void)cursorUpdate:-method

- (void)createTrackingArea
  {
   NSTrackingAreaOptions options = NSTrackingInVisibleRect | NSTrackingCursorUpdate;
   NSTrackingArea *area = [[NSTrackingArea alloc] initWithRect:self.bounds options:options owner:self userInfo:nil];
   [self addTrackingArea:area];
  }


- (void)cursorUpdate:(NSEvent *)event
  {
   [[NSCursor pointingHandCursor] set];
  }

这篇关于可可nsview更改光标的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！