IT博客-十三郎的IT生活-随笔分类-iPhone

iOS的 BOOL bool Boolean boolean_t区别

十三郎 — Wed, 12 Mar 2014 13:04:00 GMT

@import url(http://www.cnitblog.com/CuteSoft_Client/CuteEditor/Load.ashx?type=style&file=SyntaxHighlighter.css);@import url(/css/cuteeditor.css);

BOOL typedef signed char BOOL;

YES #define YES (BOOL)1

NO #define NO (BOOL)0

BOOL 使用了一个8 位（一个字节）的整数进行表示，8 位全0 就是NO。

2^8 = 512

8960 用二进制表示是大于8 位的，也就是说高位无效，

只保留8960 的低八位，8960 的低八位恰好全都是0，因此8960 就是NO 了

因此在Objective-C中一定要注意这个问题，非零值未必是BOOL 的YES，但是0 一定是NO。

bool c语言 int

Defined in stdbool.h, ISO C/C++ standard type

true 非0

false 0

Boolean unsigned char type

Mac OS historic type, sizeof(Boolean)==1

boolean_t int type

#ifndef _MACH_I386_BOOLEAN_H_

#define _MACH_I386_BOOLEAN_H_

#if defined(__x86_64__) && !defined(KERNEL)

typedef unsigned int boolean_t;

#else

typedef int boolean_t;

#endif

#endif /* _MACH_I386_BOOLEAN_H_ */

十三郎 2014-03-12 21:04 发表评论

Installing ffmpeg ios libraries armv7, armv7s, i386 and universal on Mac with 10.8

十三郎 — Tue, 22 Oct 2013 06:59:00 GMT

FFmpeg Build Instructions MAC 10.8 or better

Copy ffmpeg-2.0.tar.bz2 (https://ffmpeg.org/releases/ffmpeg-1.0.7.tar.bz2,https://ffmpeg.org/download.html) and Unzip to Documents folder

Install gas-preprocessor

Click on the ZIP icon to download https://github.com/mansr/gas-preprocessor.
Copy gas-preprocessor.pl to /usr/bin directory.
Change permission of gas-preprocessor.pl by setting the privilege to Read & Write for all.

open terminal and paste in following command and press enter:

export DEVELOPER_DIR="/Applications/Xcode.app/Contents/Developer/"

cd to ffmpeg-2 folder and paste in following command and press enter:

mkdir armv7
mkdir armv7s
mkdir i386
mkdir -p universal/lib

./configure --prefix=armv7 --disable-ffmpeg --disable-ffplay --disable-ffprobe --disable-ffserver --enable-avresample --enable-cross-compile --sysroot="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk" --target-os=darwin --cc="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc" --extra-cflags="-arch armv7 -mfpu=neon -miphoneos-version-min=6.1" --extra-ldflags="-arch armv7 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk -miphoneos-version-min=6.1" --arch=arm --cpu=cortex-a9 --enable-pic

make clean && make && make install

./configure --prefix=armv7s --disable-ffmpeg --disable-ffplay --disable-ffprobe --disable-ffserver --enable-avresample --enable-cross-compile --sysroot="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk" --target-os=darwin --cc="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc" --extra-cflags="-arch armv7s -mfpu=neon -miphoneos-version-min=6.1" --extra-ldflags="-arch armv7s -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk -miphoneos-version-min=6.1" --arch=arm --cpu=cortex-a9 --enable-pic

make clean && make && make install

./configure --prefix=i386 --disable-ffmpeg --disable-ffplay --disable-ffprobe --disable-ffserver --enable-avresample --enable-cross-compile --sysroot="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator7.0.sdk" --target-os=darwin --cc="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc" --extra-cflags="-arch i386" --extra-ldflags="-arch i386 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator7.0.sdk -miphoneos-version-min=6.1" --arch=i386 --cpu=i386 --enable-pic --disable-asm

make clean && make && make install


To make universal library ( which is the library added to xcode ) paste in following command and press enter:
cd armv7/lib
for file in *.a
do
cd ../..
xcrun -sdk iphoneos lipo -output universal/lib/$file  -create -arch armv7 armv7/lib/$file -arch armv7s armv7s/lib/$file -arch i386 i386/lib/$file
echo "Universal $file created."
cd -
done
cd ../..
导入Xcode后，设置 Header Search Paths路径(ffmpeg所在路径)

十三郎 2013-10-22 14:59 发表评论

iPhone开发各种图标大小

十三郎 — Thu, 09 Jun 2011 05:58:00 GMT

发布
512x512 1024x1024

New Document

	iPhone	iPad
分辨率为	320x480, 320x480(i4),320x568(i5) ,375x667(i6),414x736(i6+)	1024x768
像素	320x480, 640x960(i4),640x1136(i5) ,750x1334(i6),1242x2208(i6+)
状态栏(电池)	20	20
导航栏	44	44
tab bar	49	49
tab内图片	30x30 max: 48x32	30x30
桌面图标	57x57	72x72
spotlight	50x50
setting	29x29

在Iphone 960px X 640px分辨率中
图标显示尺寸 114px X 114px
20像素的圆角
4像素的90度黑色投影
2像素的90度白色内投影
默认自带的高光

在Iphone 480px X 320px分辨率中
图标显示尺寸 57px X 57px
10像素的圆角
2像素的90度黑色投影
1像素的90度白色内投影
默认自带的高光

在Ipad 1024px X 768px分辨率中
图标显示尺寸 72px X 72px
13像素的圆角
2像素的90度黑色投影
1像素的90度白色内投影
默认自带的高光

图标标准：
    90度直角边
    没有高光
    不带alpha通道透明
    另外要提供48×48图标一个，用于spotlight搜索和设置

图片深度24位(RGB各8位)，另带8位alpha通道，建议使用PNG格式图片

视频

16:9

1920:1080

十三郎 2011-06-09 13:58 发表评论