Blair McArthur Noobish1
steipete
/ UIKitLegacyDetector.m
Last active
May 21, 2025 10:07
A simple way to detect at runtime if we're running in UIKit legacy mode or the new "flat" variant. Written for our PDF iOS SDK (http://pspdfkit.com), where the precompiled binary needs to detect at runtime in what variant it's running. Want more stuff like that? Follow me on Twitter: http://twitter.com/steipete
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| // Taken from http://PSPDFKit.com. This snippet is under public domain. | |
| #define UIKitVersionNumber_iOS_7_0 0xB57 | |
| BOOL PSPDFIsUIKitFlatMode(void) { | |
| static BOOL isUIKitFlatMode = NO; | |
| static dispatch_once_t onceToken; | |
| dispatch_once(&onceToken, ^{ | |
| // We get the modern UIKit if system is running >= iOS 7 and we were linked with >= SDK 7. | |
| if (kCFCoreFoundationVersionNumber >= kCFCoreFoundationVersionNumber_iOS_7_0) { | |
| isUIKitFlatMode = (NSVersionOfLinkTimeLibrary("UIKit") >> 16) >= UIKitVersionNumber_iOS_7_0; | |
| } |
drance
/ UIViewController+BHSContainment.m
Last active
September 2, 2021 00:26
Tired of the UIViewController containment three-step. Adds a convenience param if the destination superview is not actually the parent VC's main view.
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| @implementation UIViewController (BHSContainment) | |
| - (void)bhs_addChildViewController:(UIViewController *)child { | |
| [self bhs_addChildViewController:child superview:self.view]; | |
| } | |
| // Note this potentially forces view loads on both parent and child | |
| // Not a problem if used in -viewDidLoad or later | |
| // Use superview parameter with care. If it's not within the parent VC's hierarchy, you deserve to lose |
steipete
/ PSPDFUIKitMainThreadGuard.m
Last active
October 30, 2025 15:53
This is a guard that tracks down UIKit access on threads other than main. This snippet is taken from the commercial iOS PDF framework http://pspdfkit.com, but relicensed under MIT. Works because a lot of calls internally call setNeedsDisplay or setNeedsLayout. Won't catch everything, but it's very lightweight and usually does the job.You might n…
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| // Taken from the commercial iOS PDF framework http://pspdfkit.com. | |
| // Copyright (c) 2014 Peter Steinberger, PSPDFKit GmbH. All rights reserved. | |
| // Licensed under MIT (http://opensource.org/licenses/MIT) | |
| // | |
| // You should only use this in debug builds. It doesn't use private API, but I wouldn't ship it. | |
| // PLEASE DUPE rdar://27192338 (https://openradar.appspot.com/27192338) if you would like to see this in UIKit. | |
| #import <objc/runtime.h> | |
| #import <objc/message.h> |
subdigital
/ pns.m
Created
January 5, 2013 21:59
What are your favorite Xcode Snippets? Add them in the comments.
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| // Property Nonatomic Strong | |
| // Platform: All | |
| // Completion Scopes: ClassInterfaceMethods | |
| @property (nonatomic, strong) <# class_name #> *<# variable_name #>; |
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