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@krzysztofzablocki
krzysztofzablocki / Asserts
Created July 3, 2013 18:52
My take on assertions, code sample accompanying blog post at http://merowing.info/2013/07/expanded-use-of-asserts/
typedef NS_ENUM(NSInteger, kErrorCode) {
kErrorCodeInternal = 431432,
};
//! generate error and log it.
extern NSError *pixle_NSErrorMake(NSString *message, NSUInteger code, NSDictionary *aUserInfo, SEL selector);
#define AssertTrueOrReturnBlock(condition, block) do{ NSAssert((condition), @"Invalid condition not satisfying: %s", #condition);\
if(!(condition)) { block(pixle_NSErrorMake([NSString stringWithFormat:@"Invalid condition not satisfying: %s", #condition], kErrorCodeInternal, nil, _cmd)); return;} }while(0)
In order for this to work you need ffmpeg. I tried with version 1.2.1.
1) Play the video you want to download in the browser
2) Inspect the video element on the page
3) Copy the video url from the page source (something like http://devstreaming.apple.com/videos/wwdc/2013/.../101/ref.mov)
4) In this url replace "ref.mov" with "iphone_c.m3u8" (for 960x540 resolution) or "atp.m3u8" if you want more (probably 720p?)
5) Execute `ffmpeg -y -i http://devstreaming.apple.com/videos/wwdc/2013/.../101/iphone_c.m3u8 output.mp4`
6) There is your video :)
@steipete
steipete / PSPDFUIKitMainThreadGuard.m
Last active May 27, 2024 12:11
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…
// 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>
@steipete
steipete / PSPDFViewController.h
Last active June 6, 2017 03:56
This method will help to prevent a lot of emails about "weird bugs".
// Defines a yet undocumented method to add a warning if super isn't called.
#ifndef NS_REQUIRES_SUPER
#if __has_attribute(objc_requires_super)
#define NS_REQUIRES_SUPER __attribute((objc_requires_super))
#else
#define NS_REQUIRES_SUPER
#endif
#endif
@interface UIViewController (SubclassingWarnings)
@daveanderson
daveanderson / enterprise.html
Created May 9, 2013 19:18
Direct URL enterprise distribution
<html>
<head>
<meta http-equiv="Refresh" content="0; url=itms-services://?action=download-manifest&url=http://bucket.s3.amazonaws.com/AppName.plist" />
</head>
<a href="itms-services://?action=download-manifest&url=http://bucket.s3.amazonaws.com/AppName.plist">Install AppName</a>
</html>
@mattt
mattt / uiappearance-selector.md
Last active February 7, 2025 15:27
A list of methods and properties conforming to `UIAppearance` as of iOS 12 Beta 3

Generate the list yourself:

$ cd /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS*.sdk/System/Library/Frameworks/UIKit.framework/Headers
$ grep UI_APPEARANCE_SELECTOR ./*     | \
  sed 's/NS_AVAILABLE_IOS(.*)//g'     | \
  sed 's/NS_DEPRECATED_IOS(.*)//g'    | \
  sed 's/API_AVAILABLE(.*)//g'        | \
  sed 's/API_UNAVAILABLE(.*)//g'      | \
 sed 's/UI_APPEARANCE_SELECTOR//g' | \
@mpospese
mpospese / CGRectIntegralScaled.m
Created February 28, 2013 03:34
Pixel aligns rectangles, taking the device's screen scale into account.
CGRect CGRectIntegralScaledEx(CGRect rect, CGFloat scale)
{
return CGRectMake(floorf(rect.origin.x * scale) / scale, floorf(rect.origin.y * scale) / scale, ceilf(rect.size.width * scale) / scale, ceilf(rect.size.height * scale) / scale);
}
CGRect CGRectIntegralScaled(CGRect rect)
{
return CGRectIntegralScaledEx(rect, [[UIScreen mainScreen] scale]);
}
@tonyarnold
tonyarnold / mr-save-patterns.md
Last active October 21, 2023 00:55
Common save patterns for use with MagicalRecord

Common Save Patterns

Standard background save

Assuming that you don't care which NSManagedObjectContext is used, and you just want to make some changes and save them in the background, use the following method. 90% of the time, this is what you'll want.

NSManagedObjectSubclass *myObject = [NSManagedObjectSubclass MR_findFirst];

[MagicalRecord saveWithBlock:^(NSManagedObjectContext *localContext) {
@kvnsmth
kvnsmth / example-subtree-usage.md
Last active March 24, 2025 17:21
A real world usage for git subtrees.

Let's say you have an iOS project, and you want to use some external library, like AFNetworking. How do you integrate it?

With submodules

Add the project to your repo:

git submodule add [email protected]:AFNetworking/AFNetworking.git Vendor/AFNetworking

or something to that effect.

@krzysztofzablocki
krzysztofzablocki / gist:4396302
Last active November 24, 2021 19:17
Set symbol breakpoint on objc_msgSend then setup this debug command to log all methods called in iOS Simulator. If you want to do device debugging change esp+4 register to r0, esp+8 to r1 Found long ago somewhere on stackoverflow.
expr -- (void)printf("[%s, %s]\n",(char *) object_getClassName(*(long*)($esp+4)), (char *) *(long *)($esp+8) )