Python provide a lot of built-in exception classes. All the built-in classes are sub class of builtins.BaseException class. Besides built-in exception class, you can also create customize exception class. But […]
When i use eclipse to open an exist PyDev project, i find error message like Unresolved import: smtplib. This error means the python3 built-in library smtplib can not be found […]
UIKit.UIProgressView class is used to implement iOS progress bar component. This article will tell you how to use it both in Main.storyboard visually and swift source code programmatically. First let […]
This example will tell you how to use UIActivityIndicatorView class to implement iOS activity indicator both visually ( in Main.storyboard file ) and programmatically in swift source code. First let […]
When i develop iOS app user interface, i add one button and one activity indicator in the main storyboard file. Because i want to write swift source code to manage […]
We all know iOS alert dialog is a modal dialog which will prompt at iOS device screen center in usual, but it can also slide out from iOS screen bottom. […]
This example will show you how to create a swift button programmatically and how to set it’s text, text color, border width, border color, border corner radius and most important […]
This article will tell you how to add one button, two buttons, three buttons and editable text field in an iOS alert dialog in swift. The alert button style type […]
WebKit.WKWebView class provide functions to implement a micro web browser. It mainly provide three functions which can be used to load and display local html file data, local binary file […]
