develop tip

Git Sparse Checkout
$mkdir project_folder
$cd project_folder
$git init
$git remote add -f origin <url>
$git config core.sparsecheckout true

list you files and directories in .git/info/sparse-checkout

$echo “libs” >> .git/info/sparse-checkout
$echo “apps/register.go” >> .git/info/sparse-checkout
$echo “resource/css” >> .git/info/sparse-checkout

$git pull origin master

detail in

https://link.zhihu.com/?target=http%3A//schacon.github.io/git/git-read-tree.html%23_sparse_checkout

Import swift project to another swift project
"import $(SWIFT_MODULE_NAME)" in the swift file

Djinni
http://mobilecpptutorials.com/your-first-cross-platform-djinni-app-part-1-cplusplus/
1. down djinni and gyp
$ git submodule add https://github.com/dropbox/djinni.git deps/djinni
$ git submodule add https://chromium.googlesource.com/external/gyp.git deps/gyp
gyp need to set to an older version
$ cd deps/gyp
$ git checkout -q 0bb67471bca068996e15b56738fa4824dfa19de0

2. genrate the interactive code
edit the djinni for c++ interface helloworld.djinni
edit the sh script, run_djinni.sh
$  sh ./ run_djinni.sh

3. genrate the ios project
edit libhelloworld.gyp
edit Mkefile
$ make ios

4. modify the ios project
delete jni src and jni config
add libraries libhelloworld_objc.a and libdjinni_objc.a
add User header Search Paths" 
  $(SRCROOT)/../../deps/djinni/support-lib/objc
  $(SRCROOT)/../../generated-src/objc
in swift project need to add a empty cpp file to enable c++ librarie support
in objectc need to modify main.m to main.mm

android has more holes than ios
error: 'mutex' in namespace 'std' does not name a type
cppFlags.add(“-D_GLIBCXX_HAS_GTHREADS”)

#more infomation
http://tools.android.com/tech-docs/new-build-system/gradle-experimental?pli=1#TOC-Gradle-Requirements


https://codelabs.developers.google.com/codelabs/android-studio-jni/index.html?index=..%2F..%2Findex#0

crash when hide keyboard
the "Editing Did End" event added in storyboard,  but I forget it, when the event send out, but there is no function to handle, or the function is nil, so it crash. It is easy but hard to find


WWDR intermediate certificate expired cause upload app error
the error message is "missing ios distribution signing identity for "
https://developer.apple.com/support/certificates/expiration/
From Apple -
Thanks for bringing this to the attention of the community and apologies for the issues you’ve been having. This issue stems from having a copy of the expired WWDR Intermediate certificate in both your System and Login keychains. To resolve the issue, you should first download and install the new WWDR intermediate certificate (by double-clicking on the file). Next, in the Keychain Access application, select the System keychain. Make sure to select “Show Expired Certificates” in the View menu and then delete the expired version of the Apple Worldwide Developer Relations Certificate Authority Intermediate certificate (expired on February 14, 2016). Your certificates should now appear as valid in Keychain Access and be available to Xcode for submissions to the App Store.

upload app keyword to keep me rember
0. update WWDR
WWDR intermediate certificate

1. generate certificate
https://developer.apple.com/account/ios/certificate/distribution

2. add app id
https://developer.apple.com/account/ios/identifier/bundle

3. uploade app
configure in xcode, app bundle identifier, version, .....Busild Settings->Code Signing->Code Signing Identity ... Provisioning Profile
Producte->Archive

add Admob
https://developers.google.com/admob/ios/quick-start#prerequisites
1. install cocoapods

$ sudo gem install cocoapods

2. edit podfile

source 'https://github.com/CocoaPods/Specs.git'

platform :ios, '7.0'

target "USNIT" do

pod 'Google-Mobile-Ads-SDK', '~> 7.8'

end

3. $ pod update

4.  adding the two frameworks - CoreBluetooth and SafariServices 

5.  https://developers.google.com/admob/ios/quick-start

i implement by code in AdmobBanner.swift

A valid provisioning profile for this executable was not found
change code signing to Developer