Preface It’s been a long time since I wrote a technical article. This one records a small detail of the keyboard pop-up animation, with a flow like WeChat. Here’s the image Animation detail ...

Preface The Netherlands is known as the “wagoner of the seas”. The story told today is a love story related to the wagoner of the seas, but it belongs to the East, to China. The Boat🚢 It is a ...

Preface Recently I was developing a live-streaming app, and I found that once CPU usage maxed out, the CPU downclocked, overheating got severe, and then came the stutter… To pinpoint this problem...

Preface Taptic Engine is a brand-new vibration module introduced on Apple products; it first appeared in the Apple Watch. The iPhone 6s and iPhone 6s Plus also have a built-in Taptic Engine, wit...

- (UIView *)containerBackgroundView { if (!_containerBackgroundView) { UIToolbar *toolBar = [[UIToolbar alloc] initWithFrame:CGRectZero]; toolBar.barStyle = UIBarStyleBlack; ...

bash and its features bash is essentially an executable program — a user’s working environment. Under each shell you can open another shell; the newly opened shell can be called a subshell,...

Preface Today I ran into a requirement: the PM asked that the input field strip out anything that isn’t a letter, number, or Chinese character. With this question in mind, today’s article begin...

Preface Recently I ran into a simple but tricky problem in a development requirement. First, look at the requirement A UILabel displays a string with different sizes and colors. Of course, att...

Preface Shortly after my previous article was published, WWDC2018 kicked off. What I found a bit of a pain was that Swift 4.2 added system-level random number support. So I had to fill in the ga...

Preface Today is Children’s Day, so I’ll write a technical article on random numbers to commemorate the childhood of “left-behind children (veteran level)”. Using Random Numbers in Swift In ou...