我有一个 NSOpenPanel。但我想让它只能选择 PDF 文件。我正在寻找类似的东西:
// NOT WORKING
NSOpenPanel *panel;
panel = [NSOpenPanel openPanel];
[panel setFloatingPanel:YES];
[panel setCanChooseDirectories:YES];
[panel setCanChooseFiles:YES];
[panel setAllowsMultipleSelection:YES];
[panel setAllowedFileTypes:[NSArray arrayWithObject:@"pdf"]];
int i = [panel runModalForTypes:nil];
if(i == NSOKButton){
return [panel filenames];
}
我希望有人有解决方案。
我注意到一些事情......改变setCanChooseDirectories
到NO。启用后,这表明文件夹是有效输入。这很可能不是您想要的功能。您可能还想将允许的文件类型更改为[NSArray arrayWithObject:@"pdf", @"PDF", nil]
对于区分大小写的系统。runModalForTypes
应该是文件类型的数组。将您的代码更改为如下所示:
// WORKING :)
NSOpenPanel *panel;
NSArray* fileTypes = [NSArray arrayWithObjects:@"pdf", @"PDF", nil];
panel = [NSOpenPanel openPanel];
[panel setFloatingPanel:YES];
[panel setCanChooseDirectories:NO];
[panel setCanChooseFiles:YES];
[panel setAllowsMultipleSelection:YES];
[panel setAllowedFileTypes:fileTypes];
int i = [panel runModal];
if(i == NSOKButton){
return [panel URLs];
}
斯威夫特 4.2:
let fileTypes = ["jpg", "png", "jpeg"]
let panel = NSOpenPanel()
panel.canChooseFiles = true
panel.canChooseDirectories = false
panel.allowsMultipleSelection = false
panel.allowedFileTypes = fileTypes
panel.beginSheetModal(for: window) { (result) in
if result.rawValue == NSApplication.ModalResponse.OK.rawValue {
// Do something with the result.
let selectedFolder = panel.urls[0]
print(selectedFolder)
}
}
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