105 lines
3.5 KiB
Objective-C
105 lines
3.5 KiB
Objective-C
/*
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Copyright 2020 Vector Creations Ltd
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#import "MXKPreviewViewController.h"
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@import QuickLook;
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@interface MXKPreviewViewController () <QLPreviewControllerDataSource>
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/// A specialized view controller for previewing an item.
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@property (nonatomic, weak) QLPreviewController *previewController;
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/// URL of the file to preview
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@property (nonatomic, strong) NSURL *fileURL;
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/// YES to display actions Button. NO otherwise
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@property (nonatomic) BOOL allowActions;
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@property (nonatomic, weak) id<MXKPreviewViewControllerDelegate> previewDelegate;
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@end
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@implementation MXKPreviewViewController
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+ (MXKPreviewViewController *)presentFrom:(UIViewController *)presenting fileUrl:(NSURL *)fileUrl allowActions:(BOOL)allowActions delegate:(nullable id<MXKPreviewViewControllerDelegate>)delegate
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{
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MXKPreviewViewController *previewController = [[MXKPreviewViewController alloc] initWithFileUrl: fileUrl allowActions: allowActions];
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previewController.previewDelegate = delegate;
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if ([delegate respondsToSelector:@selector(previewViewControllerWillBeginPreview:)]) {
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[delegate previewViewControllerWillBeginPreview:previewController];
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}
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[presenting presentViewController:previewController animated:YES completion:^{
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}];
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return previewController;
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}
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- (instancetype)initWithFileUrl: (NSURL *)fileUrl allowActions: (BOOL)allowActions
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{
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QLPreviewController *previewController = [[QLPreviewController alloc] init];
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self = [super initWithRootViewController:previewController];
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self.previewController = previewController;
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if (self)
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{
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self.modalPresentationStyle = UIModalPresentationFullScreen;
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self.fileURL = fileUrl;
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self.allowActions = allowActions;
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self.previewController.dataSource = self;
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self.previewController.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(doneAction:)];
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}
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return self;
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}
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- (void)viewDidLayoutSubviews
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{
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[super viewDidLayoutSubviews];
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if (!self.allowActions)
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{
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NSMutableArray *items = [NSMutableArray arrayWithArray: self.previewController.navigationItem.rightBarButtonItems];
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if (items.count > 0)
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{
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[items removeObjectAtIndex:0];
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}
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self.previewController.navigationItem.rightBarButtonItems = items;
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}
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}
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- (IBAction)doneAction:(id)sender
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{
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[self dismissViewControllerAnimated:YES completion:^{
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if ([self.previewDelegate respondsToSelector:@selector(previewViewControllerDidEndPreview:)]) {
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[self.previewDelegate previewViewControllerDidEndPreview:self];
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}
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}];
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}
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#pragma mark - QLPreviewControllerDataSource
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- (NSInteger)numberOfPreviewItemsInPreviewController:(nonnull QLPreviewController *)controller
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{
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return self.fileURL ? 1 : 0;
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}
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- (nonnull id<QLPreviewItem>)previewController:(nonnull QLPreviewController *)controller previewItemAtIndex:(NSInteger)index
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{
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return self.fileURL;
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}
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@end
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