Gem install can't find binary after updating Ruby

I always use rbenv,Until this time after updating cocoapods,Execution error,of course,Visual inspection should be caused by my ruby ​​environment being too old,So I tried rbenv install 3.0.2 ,But unfortunately,Reported an error,Go to the official warehouse of rbenv to take a look,The last version is still 2019...Okay,[……]

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Open Xcode Live Preview for UIKit

One of the big benefits of using SwiftUI is that you can hot update the App like Flutter,UI code changed,Will be directly reflected in the simulator or the real machine,Greatly improve the efficiency of writing user interfaces,No need to change 1px,run,Various clicks,Then check the loop of effects。But it's too early to use SwiftUI,After all, there is still a lot of iOS 12 Equipment in operation[……]

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Published
Categorized as Mac OS, Swift

macOS uses the atos command to parse arbitrary crash records and sample data

Recently, the drop grid input method has encountered several difficult to reproduce problems-the key is that it will not cause a crash。This makes the crash statistics function completely ineffective,The specific performance is that the input method will suddenly get stuck for a few seconds in some cases,Very annoying。Then I thought,macOS comes with activity manager,There is a "sampling" function,You can see the current execution (call) status of the corresponding process,Can I use it to analyze the cause of the error?

In Japan[……]

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Cocoa Binding practical tutorial

First of all, this is not a new technology,It's very old,So old that almost no one mentions it。

This is a product of Apple's MVC model,It was born when there was no iPhone,It is used in conjunction with the Xcode graphical setting interface-such as NIB,of course,Now it has become XIB,Oh,And storyboard。

Now if you want to bind one[……]

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

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 on macOS[……]

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Published
Categorized as Python Tagged

Python detects its own memory footprint in real time

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 does both[……]

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iOS correctly set the status bar style color

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:[crayon[……]

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Swift Python Json data exchange signature

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,Therefore, the direct use of App and Apple[……]

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