| // | |
| // SFSymbols.swift | |
| // | |
| // Created from SF Symbols (Version 4.0 [80]) | |
| // Copyright ©2019-2022 Apple Inc. | |
| // | |
| import SwiftUI | |
| public enum SFSymbols {} |
| #!/bin/bash | |
| # NAS IP: 192.168.1.10 in this example | |
| # DHCP scope reservation for macvlan: 192.168.1.210/28 (Details below) | |
| ## Network: 192.168.1.210/28 | |
| ## HostMin: 192.168.1.211 | |
| ## HostMax: 192.168.1.224 | |
| ## Hosts/Net: 14 | |
| # Create a Synology macvlan0 bridge network attached to the physical eth0, and add the ip range scope (sudo) |
A common task when developing iOS apps is to register custom cell subclasses for both UITableView and UICollectionView. Well, that is if you don’t use Storyboards, of course.
Both UITableView and UICollectionView offer a similar API to register custom cell classes:
public func registerClass(cellClass: AnyClass?, forCellWithReuseIdentifier identifier: String)
public func registerNib(nib: UINib?, forCellWithReuseIdentifier identifier: String)
| enum AsyncError: Error { | |
| case finishedWithoutValue | |
| } | |
| extension AnyPublisher { | |
| func async() async throws -> Output { | |
| try await withCheckedThrowingContinuation { continuation in | |
| var cancellable: AnyCancellable? | |
| var finishedWithoutValue = true | |
| cancellable = first() |
UICollectionViewDiffableDataSource does an excellent job of handling changes to data and updating the items accordingly. However, there seems to be no good way to handle updates to existing items. If you follow the samples that Apple provides and define Equatable and Hashable to use an id instead of the complete models value, value changes won't cause the collection view to update those cells. If you leave Equatable as it should be and have it compare all values of a model, the cell will update, but it will completely replace the old cell, causing an undesirable "flash".
UICollectionViewComparableDataSource wraps a UICollectionViewDiffableDataSource and will check for items that have been updated, but not removed or added.
This allows us to make updates to a cell without completely reloading it. This is especially usefull if your cells have some sort of temporary state.
This is just an expirement. Use at your own risk.
| // The issue with sectionHeadersPinToVisibleBounds and sectionFootersPinToVisibleBounds is that they do not pin | |
| // first header and last footer when bouncing. This layout subclass fixes that. | |
| class StickyLayout: UICollectionViewFlowLayout { | |
| override init() { | |
| super.init() | |
| self.sectionFootersPinToVisibleBounds = true | |
| self.sectionHeadersPinToVisibleBounds = true | |
| } |
| #import <RestKit/RestKit.h> | |
| #import "CoreData+MagicalRecord.h" | |
| // Use a class extension to expose access to MagicalRecord's private setter methods | |
| @interface NSManagedObjectContext () | |
| + (void)MR_setRootSavingContext:(NSManagedObjectContext *)context; | |
| + (void)MR_setDefaultContext:(NSManagedObjectContext *)moc; | |
| @end | |
| @implementation AppDelegate |
The attached lldb command pblock command lets you peek inside an Objective-C block. It tries to tell you where to find the source code for the block, and the values captured by the block when it was created.
Consider this example program:
#import <Foundation/Foundation.h>
@interface Foo: NSObject
@end
@implementation Foo
| // | |
| // CoreDataController.h | |
| // | |
| // Created by Keith Harrison http://useyourloaf.com | |
| // Copyright (c) 2016 Keith Harrison. All rights reserved. | |
| // | |
| // Redistribution and use in source and binary forms, with or without | |
| // modification, are permitted provided that the following conditions are met: | |
| // | |
| // 1. Redistributions of source code must retain the above copyright |
| // | |
| // CoreDataController.swift | |
| // | |
| // Created by Keith Harrison http://useyourloaf.com | |
| // Copyright (c) 2017 Keith Harrison. All rights reserved. | |
| // | |
| // Redistribution and use in source and binary forms, with or without | |
| // modification, are permitted provided that the following conditions are met: | |
| // | |
| // 1. Redistributions of source code must retain the above copyright |