密码字段在受密码保护的pdf上不可见 [英] Password field not visible on password protected pdf

问题描述

我正在使用PDF套件框架来显示/编辑pdf文件.它在macOS 10.12上严重损坏.有时受密码保护的文件不显示密码字段，而有时在普通文件中可见密码字段.

I am using PDF kit framework to display/Edit pdf files. Its broken badly on macOS 10.12. Sometimes password protected files do not display password field and sometimes password field is visible in normal file.

推荐答案

我能够使用未公开的API来解决此问题.其问题与隐藏/取消隐藏密码视图有关.

I am able to fix this using undocumented APIs. Its issue related to hide/unhide password view.

/*
 From class dump of pdf kit
 @interface PDFPasswordViewController : NSViewController
 {
 NSTextField *_passwordField;
 NSTextField *_passwordPrompt;
 NSTextField *_passwordInstruction;
 NSView *_passwordView;
 PDFView *_pdfView;
 }

 - (void).cxx_destruct;
 - (void)_commonInit;
 - (void)passwordEntered:(id)arg1;
 - (void)setPDFView:(id)arg1;
 - (void)loadView;

 @end
 */

/*
 @private
 PDFViewPrivate* _private;
 Available in PDFView.h file
 */
id PDFViewPrivate = [self.pdfView valueForKey:@"_private"];
if (PDFViewPrivate)
{
    NSViewController *passwordViewController = [PDFViewPrivate valueForKey:@"passwordViewController"];
    NSView *passwordView = [passwordViewController valueForKey:@"_passwordView"];
    if (self.pdfView.document.isLocked)
    {
        NSTextField *passwordField = [passwordViewController valueForKey:@"_passwordField"];
        // Reset last password
        [passwordField setStringValue:@""];
        // Add password view
        passwordView.hidden = NO;
    }
    else
    {
        passwordView.hidden = YES;
    }
}

PDFPasswordViewController仅在10.12上可用

PDFPasswordViewController is only available on 10.12

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