macos NSOpenPanel - 一切都被弃用了？
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NSOpenPanel - Everything deprecated?
提问by Cole
I've been trying to get a window to show up asking the person to choose a file, and I eventually did. The problem is, Xcode complains that the method I'm using is deprecated. I looked in the class reference, but everything under the "running panels" section has been deprecated as of Mac OS 10.6. Is there a different class I'm supposed to be using now?
我一直试图让一个窗口出现，要求该人选择一个文件，我最终做到了。问题是，Xcode 抱怨我使用的方法已被弃用。我查看了类参考，但从 Mac OS 10.6 开始，“运行面板”部分下的所有内容都已弃用。我现在应该使用不同的课程吗？
回答by Guillaume
In 10.6, there was a few changes to this classes. One of the benefits is that there is now a block-based API.
在 10.6 中，对此类进行了一些更改。好处之一是现在有一个基于块的 API。
Here is a code snippet on how to use that:
这是有关如何使用它的代码片段：
NSOpenPanel *panel = [[NSOpenPanel openPanel] retain];
// Configure your panel the way you want it
[panel setCanChooseFiles:YES];
[panel setCanChooseDirectories:NO];
[panel setAllowsMultipleSelection:YES];
[panel setAllowedFileTypes:[NSArray arrayWithObject:@"txt"]];
[panel beginWithCompletionHandler:^(NSInteger result){
if (result == NSFileHandlingPanelOKButton) {
for (NSURL *fileURL in [panel URLs]) {
// Do what you want with fileURL
// ...
}
}
[panel release];
}];
回答by Jesse Dunlap
As far as I know, you can use the runModalmethod like shown below:
据我所知，您可以使用runModal如下所示的方法：
NSOpenPanel *openPanel = [[NSOpenPanel alloc] init];
if ([openPanel runModal] == NSOKButton)
{
NSString *selectedFileName = [openPanel filename];
}
回答by digitalHound
Seeing how I found this question useful six years later, and since there are no swift answers, here's a swift solution.
六年后看到我如何发现这个问题很有用，并且由于没有快速的答案，这里有一个快速的解决方案。
You'll find two samples, one as a stand alone window and the other as a sheet.
您会发现两个样本，一个作为独立窗口，另一个作为工作表。
Swift 3.0
斯威夫特 3.0
func selectIcon() {
// create panel
let panel = NSOpenPanel()
// configure as desired
panel.canChooseFiles = true
panel.canChooseDirectories = false
panel.allowsMultipleSelection = false
panel.allowedFileTypes = ["png"]
// *** ONLY USE ONE OF THE FOLLOWING OPTIONS, NOT BOTH ***
// ********************** OPTION 1 ***********************
// use this if you want a selection window to display that is
// displayed as a separate stand alone window
panel.begin { [weak self] (result) in
guard result == NSFileHandlingPanelOKButton, panel.urls.isEmpty == false, let url = panel.urls.first else {
return
}
let image = NSImage.init(contentsOf: url)
DispatchQueue.main.async {
self?.iconImageView.image = image
}
}
// ********************** OPTION 2 ***********************
// use this if you want a sheet style view that displays sliding
// down from your apps window
panel.beginSheetModal(for: self.view.window!) { [weak self] (result) in
guard result == NSFileHandlingPanelOKButton, panel.urls.isEmpty == false, let url = panel.urls.first else {
return
}
let image = NSImage.init(contentsOf: url)
DispatchQueue.main.async {
self?.iconImageView.image = image
}
}
}
