kmpdfkit_demo/PDFViewer/Source/PDFNote/PDFNoteViewController.m

//
//  PDFNoteViewController.m
//  PDFReader
//
//  Copyright © 2014-2022 PDF Technologies, Inc. All Rights Reserved.
//
//  The PDF Reader Sample applications are licensed with a modified BSD license.
//  Please see License for details. This notice may not be removed from this file.
//

#import "PDFNoteViewController.h"

@interface PDFNoteViewController () <UIPopoverPresentationControllerDelegate> {
    UITextView *_noteTextView;
}

@property (nonatomic,retain) NSString *textViewContent;

@end


@implementation PDFNoteViewController

#pragma mark - Init Mehods

- (void)dealloc {    
    Block_release(_callback);
    
    [_textViewContent release];
    [_noteTextView setDelegate:nil];
    [_noteTextView release];
    [super dealloc];
}

#pragma mark - UIViewController Methods

- (void)viewDidLoad {
    [super viewDidLoad];
    [self.view setBackgroundColor:[UIColor colorWithRed:253.0/255.0 green:246.0/255.0 blue:214.0/255.0 alpha:1.0]];
    
    _noteTextView = [[UITextView alloc] initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, self.view.bounds.size.height-35)];
    _noteTextView.autoresizingMask = UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight;
    [_noteTextView setBackgroundColor:[UIColor clearColor]];
    [_noteTextView setFont:[UIFont systemFontOfSize:14]];
    [_noteTextView setTextAlignment:NSTextAlignmentLeft];
    [_noteTextView setTextColor:[UIColor blackColor]];
    [self.view addSubview:_noteTextView];
    _noteTextView.text = self.textViewContent;
    
    UIButton *deleteButton = [UIButton buttonWithType:UIButtonTypeSystem];
    [deleteButton setTitle:NSLocalizedString(@"Delete", nil) forState:UIControlStateNormal];
    [deleteButton sizeToFit];
    CGRect frame = deleteButton.frame;
    frame.origin.x = 10;
    frame.origin.y = self.view.bounds.size.height-deleteButton.bounds.size.height-10;
    deleteButton.frame = frame;
    deleteButton.autoresizingMask = UIViewAutoresizingFlexibleTopMargin;
    [deleteButton addTarget:self action:@selector(buttonItemClicked_Delete:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:deleteButton];
    
    UIButton *saveButton = [UIButton buttonWithType:UIButtonTypeSystem];
    [saveButton setTitle:NSLocalizedString(@"Save", nil) forState:UIControlStateNormal];
    [saveButton sizeToFit];
    frame = saveButton.frame;
    frame.origin.x = self.view.bounds.size.width-saveButton.bounds.size.width-10;
    frame.origin.y = self.view.bounds.size.height-saveButton.bounds.size.height-10;
    saveButton.frame = frame;
    saveButton.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin|UIViewAutoresizingFlexibleTopMargin;
    [saveButton addTarget:self action:@selector(buttonItemClicked_Save:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:saveButton];
}

- (void)viewDidAppear:(BOOL)animation {
    [super viewDidAppear:animation];
    
    [_noteTextView becomeFirstResponder];
}

- (void)viewWillDisappear:(BOOL)animation {
    [super viewWillDisappear:animation];
    
    if ([_noteTextView isFirstResponder]) {
        [_noteTextView resignFirstResponder];
    }
}

#pragma mark - Public Methods

- (void)setContent:(NSString *)content {
    if (!content) {
        self.textViewContent = @"";
    } else {
        self.textViewContent = content;
    }
}

- (void)showViewController:(UIViewController *)viewController inRect:(CGRect)rect {
    self.preferredContentSize = CGSizeMake(300, 240);
    self.modalPresentationStyle = UIModalPresentationPopover;
    UIPopoverPresentationController *popVC = self.popoverPresentationController;
    popVC.delegate = self;
    popVC.sourceRect = rect;
    popVC.sourceView = viewController.view;
    [viewController presentViewController:self animated:YES completion:nil];
}

#pragma mark - Button Event Action
- (void)buttonItemClicked_Delete:(id)sender {
    [self dismissViewControllerAnimated:YES completion:^{
        if (self.callback) {
            self.callback(@"", YES);
            self.callback = nil;
        }
    }];
}

- (void)buttonItemClicked_Save:(id)sender {
    [self dismissViewControllerAnimated:YES completion:^{
        if (self.callback) {
            self.callback(_noteTextView.text, NO);
            self.callback = nil;
        }
    }];
}

#pragma mark - UIPopoverPresentationControllerDelegate

- (UIModalPresentationStyle)adaptivePresentationStyleForPresentationController:(UIPresentationController *)controller traitCollection:(UITraitCollection *)traitCollection {
    return UIModalPresentationNone;
}

- (void)popoverPresentationControllerDidDismissPopover:(UIPopoverPresentationController *)popoverPresentationController {
    if (self.callback) {
        self.callback(_noteTextView.text, NO);
        self.callback = nil;
    }
}

@end