cromandini

#!/bin/sh

UNIVERSAL_OUTPUTFOLDER=${BUILD_DIR}/${CONFIGURATION}-universal

# make sure the output directory exists
mkdir -p "${UNIVERSAL_OUTPUTFOLDER}"

# Step 1. Build Device and Simulator versions
xcodebuild -target "${PROJECT_NAME}" ONLY_ACTIVE_ARCH=NO -configuration ${CONFIGURATION} -sdk iphoneos  BUILD_DIR="${BUILD_DIR}" BUILD_ROOT="${BUILD_ROOT}" clean build
xcodebuild -target "${PROJECT_NAME}" -configuration ${CONFIGURATION} -sdk iphonesimulator ONLY_ACTIVE_ARCH=NO BUILD_DIR="${BUILD_DIR}" BUILD_ROOT="${BUILD_ROOT}" clean build

subchen

git stash用于保存和恢复工作进度

• git stash

  保存当前的工作进度。会分别对暂存区和工作区的状态进行保存

• git stash save "message..."

这条命令实际上是第一条 git stash 命令的完整版

AVPlayerCaching.m

//
//  ViewController.m
//  AVPlayerCaching
//
//  Created by Anurag Mishra on 5/19/14.
//  Sample code to demonstrate how to cache a remote audio file while streaming it with AVPlayer
//

#import "ViewController.h"
#import <AVFoundation/AVFoundation.h>

mralexgray

#import <objc/message.h>
#define DECORATE printf("\n\n+*%%$%%*+-+*%%$%%*+-+*%%$-+*%%$%%*+-+*%%$%%*+-+*%%$-+*%%$%%*+-+*%%$%%*+-\n\n")
@implementation NSObject (logProperties) - (void) logProperties {  DECORATE;  @autoreleasepool { unsigned int propCt = 0;
  const char * myName = [self.description substringWithRange:
  (NSRange){1,[self.description rangeOfString:@":"].location-1}].UTF8String;
  objc_property_t *pA = class_copyPropertyList(self.class, &propCt);
  for (int i = 0; i < propCt; i++) { NSString *name; printf("%s [%s] = %s\n",  myName,
  (name = [NSString.alloc initWithUTF8String:property_getName(pA[i])]).UTF8String,
  [objc_msgSend(self,NSSelectorFromString(name)) description].UTF8String);
} free(pA); } DECORATE; }

paolonl

- (UIImage *)rotateImage:(UIImage *)image ofAngle:(CGFloat)degrees {
    CGImageRef imgRef = image.CGImage;
  CGFloat angleInRadians = degrees * (M_PI / 180);
	CGFloat width = CGImageGetWidth(imgRef);
	CGFloat height = CGImageGetHeight(imgRef);
	
	CGRect imgRect = CGRectMake(0, 0, width, height);
	CGAffineTransform transform = CGAffineTransformMakeRotation(angleInRadians);
	CGRect rotatedRect = CGRectApplyAffineTransform(imgRect, transform);
	

steipete

// 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

nline void pspdf_dispatch_sync_reentrant(dispatch_queue_t queue, dispatch_block_t block) {
    dispatch_get_current_queue() == queue ? block() : dispatch_sync(queue, block);
}

hezi

// Declare enums like so:
#define IMAGE_STATUS(XX)  \
XX(kDOImageStatusOK, = 0) \
XX(kDOImageStatusCached, )\
XX(kDOImageStatusRetry, ) 
DECLARE_ENUM(DOImageStatus, IMAGE_STATUS)

adamawolf

i386 : iPhone Simulator
x86_64 : iPhone Simulator
arm64 : iPhone Simulator
iPhone1,1 : iPhone
iPhone1,2 : iPhone 3G
iPhone2,1 : iPhone 3GS
iPhone3,1 : iPhone 4
iPhone3,2 : iPhone 4 GSM Rev A
iPhone3,3 : iPhone 4 CDMA
iPhone4,1 : iPhone 4S

hellerbarde

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs