NSPopover不出现 [英] NSPopover Not Appearing

问题描述

我真的希望我可以更具体，但不幸的是，我不能。所有合适的对象都是非零，所有适当的方法调用都可以成功，但是我的 NSPopover 只是永远不会出现。不会调用任何委托方法。

I really wish I could be more specific, but unfortunately, I cannot. All appropriate objects are non-nil, and all appropriate method calls are going through (presumably) successfully, but my NSPopover just never shows up. None of the delegate methods get called, either.

// ivars
NSPopover *tagPopover;
NSViewController *tagPopoverViewController;

// in method to display popover
tagPopover = [[NSPopover alloc] init];
[tagPopover setBehavior: NSPopoverBehaviorApplicationDefined];
[tagPopover setDelegate: self];
tagPopoverViewController = [[MYViewController alloc] initWithNibName: @"MYViewController" bundle: nil];
[tagPopover setContentViewController: tagPopoverViewController];
[tagPopover setContentSize: tagPopoverViewController.view.frame.size];

[tagPopover showRelativeToRect: NSMakeRect(700, 400, 5, 5) // Screen coordinates
                        ofView: [[NSApp keyWindow] contentView]
                 preferredEdge: NSMinYEdge];

推荐答案

出现坐标系错误：

NSRect theRect = [[NSApp keyWindow] convertRectFromScreen: NSMakeRect(700, 400, 5, 5)];
[tagPopover showRelativeToRect: theRect // Window Coordinates
                        ofView: [[NSApp keyWindow] contentView]
                 preferredEdge: NSMinYEdge];

需要先将它转换为窗口的坐标系。

Needed to convert it to the window's coordinate system first.

这篇关于NSPopover不出现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！