tclementdev

libdispatch efficiency tips

The libdispatch is one of the most misused API due to the way it was presented to us when it was introduced and for many years after that, and due to the confusing documentation and API. This page is a compilation of important things to know if you're going to use this library. Many references are available at the end of this document pointing to comments from Apple's very own libdispatch maintainer (Pierre Habouzit).

My take-aways are:

• You should create very few, long-lived, well-defined queues. These queues should be seen as execution contexts in your program (gui, background work, ...) that benefit from executing in parallel. An important thing to note is that if these queues are all active at once, you will get as many threads running. In most apps, you probably do not need to create more than 3 or 4 queues.

• Go serial first, and as you find performance bottle necks, measure why, and if concurrency helps, apply with care, always validating under system pressure. Reuse

steventroughtonsmith

/* How to Hook with Logos
 Hooks are written with syntax similar to that of an Objective-C @implementation.
 You don't need to #include <substrate.h>, it will be done automatically, as will
 the generation of a class list and an automatic constructor.
 
 %hook ClassName
 
 // Hooking a class method
 + (id)sharedInstance {

leonaka

- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
    
    CGFloat distance = 10.0;
    [self.transitionCoordinator animateAlongsideTransition:^(id<UIViewControllerTransitionCoordinatorContext> context) {
        [UIView performWithoutAnimation:^{
            self.effectView.frame = CGRectMake(0, self.view.frame.size.height - self.effectView.frame.size.height - distance, self.view.frame.size.width, self.effectView.frame.size.height);
        }];
        self.effectView.frame = CGRectMake(0, -self.effectView.frame.size.height - distance), self.view.frame.size.width, self.effectView.frame.size.height);

mnmaraes

//
//  TUIViewController.m
//  TestUIs
//
//  Created by Murillo Nicacio de Maraes on 3/9/14.
//  Copyright (c) 2014 m-one. All rights reserved.
//

#import "TUIViewController.h"

gdavis

ACTION
AD_HOC_CODE_SIGNING_ALLOWED
ALTERNATE_GROUP
ALTERNATE_MODE
ALTERNATE_OWNER
ALWAYS_SEARCH_USER_PATHS
ALWAYS_USE_SEPARATE_HEADERMAPS
APPLE_INTERNAL_DEVELOPER_DIR
APPLE_INTERNAL_DIR
APPLE_INTERNAL_DOCUMENTATION_DIR