clang: warning: libstdc++ is deprecated; move to libc++ with a minimum deployment target of OS X 10.9

Python

Normal，You will encounter this error when installing a Python package，This package must be a package containing C ++ code。

This is due to incompatibility after macOS update，In General，The maintainer of this package should already be compatible with this particular situation：

So that it can be successfully compiled on macOS。

But if you are using PyPy，Maybe even if the maintainer includes this sentence，You can't succeed[……]

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Python detects its own memory footprint in real time

Python

Recently doing text statistics，Implemented in Python，Encountered an interesting problem-how to save statistical results。

Writing directly into memory is really impossible，Memory exhausted after ten hours，The program was forced to close。If you write directly to the database，Each write is too slow，It's been more than ten hours，If you go on like this, you will have to count on the week，Not a solution。

At last，I thought of a solution that combines both-using memory as a buffer，After reaching a certain amount, all the current data will be merged into the hard disk at one time。

But then there is a threshold，How to confirm[……]

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Safari 13 Remove Google search results jump

Mac OS
Create a new Safari plugin project using Xcode

In Safari 9 before，We just download a safariextz file and double click on it，So that Safari can load this plugin。The benefit is definitely very convenient，But it ’s also not very secure (plugins that can be downloaded everywhere，It is likely to have been tampered with)。

So later，Apple no longer allows users to directly download plug-ins to install on Safari，App must be downloaded from Mac Apple Store，Then the Safari plugin is provided in the form of a plugin in the app，With App[……]

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Avoid WordPress being used as a reflection amplification attack

Wordpress The internet

Before I wrote an article，Use fail2ban Bind9 be used to prevent DNS amplification attacks，Never imagined，original Wordpress It can also be used for amplification attacks，The principle is its Pingback mechanism。

Pingback is a tool for notifying each other of a Wordpress website，For example, A blog refers to a link to a B blog post，Then Wordpress can automatically help you inform B blog，Tell the blogger that you quoted his article。

This[……]

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iOS correctly set the status bar style color

Swift

When developing iOS apps，Many applications need to set the color of the iOS system status bar according to the current App content color，Black or white-especially on iOS 13 After the system supports the black mode。

Normal，Others will tell you to do this：

But this triggers a warning： Deprecated in iOS 9 。So is there any other way? Have，The official recommendation is[……]

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When Mailgun no longer free，How do you placed your domain mail?

The internet

Before I wrote an article：《 Use Mailgun create your free domain mail 》Mailgun There is a very interesting feature is the recipient routing，With this feature set，You can use any incoming mail forwarding to your mailbox which set a good，This eliminates the need for each domain name to set up a mail service，Only through Mailgun On the corresponding e-mail can be forwarded by e-mail needs - after all,，Usually we will use these domain mail may be a basic authentication。

Recently，Mailgun no longer free，Free users[……]

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Swift Python Json data exchange signature

Python Swift

It has been a very popular self-signed certificate for HTTPS decryption，Then there are a lot of people realize crack of App by modifying Apple's internal purchase receipt。In fact Verified Purchase should be connected to the server App，Server to communicate with Apple's servers，The results are then sent to the App - but a lot of developers (including individual developers and corporate developers) do not bother to go to a special server maintenance，So communicate directly with the App and Apple's servers，This provides an opportunity for middle attacks。

Middle attack，It means when A and B communicate[……]

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Swift Debug EXC_BAD_ACCESS in AppDelegate

Swift

 

Many people will encounter in the development EXC_BAD_ACCESS ，I'm sorry，This time, Xcode does not give any detailed solutions。

usually，This is due to a memory error caused。In simple terms it is that you create an object A，But in the later time of the visit，A memory in this area have been moved to do the system he used，Put objects such as B here - A your left hand，The actual content does not exist。

Then there will be such a collapse similar：
[pencil-68c[……]

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Swift strftime use quick format date and time

Swift

Processing time and date software development is a very common operation，Almost all programming languages ​​provide a corresponding API to facilitate the development of the date and time to process，Swift is no exception，such as DateFormatter ，You can use it any Date Custom format is converted into a text string。

--but，[crayon-68c67dd26915e936[……]

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