React Navigation 5.0 Series 1: Use of StackNavigator
Presumably the reader's friends are Official announcement: Major updates to ReactNative Navigation Library This article learns that React Navigation, the official route navigation library recommended by React Native, has been updated to the 5th edition. It also learns about specific improvements and changes. Interested friends can read this art ...
Posted by OMorchoe on Fri, 14 Feb 2020 22:13:01 -0800
Click a button, if the phone has an app installed, open the app directly, otherwise jump to the application market to download the app
Recently, we are making such a function. When the front-end webpage clicks the button, if the user's mobile phone has the app installed, the app will be opened directly; otherwise, it will jump to the application market to download. The code is as follows:
<!DOCTYPE html>
<html>
<head>
<meta charset="ut ...
Posted by friendlylad on Thu, 13 Feb 2020 13:31:32 -0800
Elegant design pattern - object oriented basis
How to understand object-oriented
Abstract is the prerequisite of encapsulation, inheritance and polymorphism. Reasonable abstraction comes from reasonable analysis and understanding of business topics. Reasonable abstraction should be self consistent and easy to understand about the relationship betwee ...
Posted by realmxofxnoise on Wed, 12 Feb 2020 21:23:25 -0800
app evokes the perfect solution and prevents browser's default pop-up behavior
https://stackoverflow.com/questions/10237031/how-to-open-a-native-ios-app-from-a-web-app
var frame = document.createElement('iframe'); frame.src = 'myapp://?params=...'; frame.style.display = 'none'; document.body.appendChild(frame); setTimeout(function() { document.body.removeChild(frame); }, 4); The above pl ...
Posted by aktell on Wed, 12 Feb 2020 08:49:09 -0800
Swift - implement the auto hidden navigation bar of the free fish commodity list head following the slide
Recently, the epidemic broke out. I didn't have a look at the idle fish IOSApp at home. I found that the function of auto hiding the navigation bar of the commodity list was very good, so I decided to write one myself.
Leisure fish:
Train of thought:
The navigation will follow the upward movement of the ...
Posted by fantomel on Tue, 11 Feb 2020 23:22:58 -0800
Rotate video using FFmpeg
I've been trying to figure out how to rotate video using FFmpeg. I'm using iPhone Video in portrait mode. I know how to use it MediaInfo (great library, by the way) determine the current rotation angle, but now I'm stuck with FFmpeg.
According to my reading, you need to use the vfilter option. From what I see, it should look like this:
ff ...
Posted by raymedia on Sun, 09 Feb 2020 03:08:04 -0800
C + + Course Design -- student status management system (MFC)
Lesson title
Student status management system
Class setting requirements
user management
Entry, modification and deletion of student status information
Calculate the total and average scores of students
Students can inquire personal student status information
Statistics of total and average scores ...
Posted by GreyFilm on Sat, 08 Feb 2020 07:54:42 -0800
Codeforces - Team Rocket Rises Again
Title Link: Codeforces - Team Rocket Rises Again
It's obvious that if we run the shortest path first, we will take out the top edge of the shortest path and make a drawing separately.
Then we can get a new graph with all the edges on the shortest path.
According to the definition of the topic, we ca ...
Posted by wikstov on Fri, 07 Feb 2020 10:56:01 -0800
OCR recognition based on Tesseract
Catalog
Demand background
Tesseract introduction and environment construction
Font training
Tesseract for iOS
summary
Demand background
Due to the limitation of the client core, most of the ID card identification in the market will be put in the server verification. The client is generally only ...
Posted by tomdelonge on Wed, 05 Feb 2020 04:01:10 -0800
HYSBZ - 2160 cheerleading rehearsal (palindrome automaton)
Title Link: Click to view
In this paper, we give a string s and an integer k. now we need to find the product of the length of all the palindrome substrings whose length is an odd number from the largest to the smallest
Problem analysis: after the palindrome automaton runs the string s once, it wil ...
Posted by berry05 on Mon, 03 Feb 2020 09:08:02 -0800