Let’s check what can we do to improve code testability by removing singletons methods calls from methods. — I don’t want to elaborate on is singletons are good, bad, useful, helps solve some problems or introduce ones. I would like to focus on how they affect code testability. Code that heavily relies on singletons is commonly considered untestable. …

When I started to write unit tests for my code main metrics for me was code coverage. I was proud because Xcode prints almost 100% coverage for all my classes— but sadly QA team starts ping me with tickets for my part of application and I was like “What? I…

If we target our application in more wide range than our country, it is good to localize application to be understandable by users. Very good habit is localize application in your native language and at least in English. Making localizations in iOS application can be little tricky. UI internationalization Old days to…

In almost every app there comes time when we have to make some formatting. Some time we need to convert Bool into readable string, more often Date object into text literal which will be understandable to people who use our application, not saying about rounding numbers to two spaces after…

Some times we need some configuration at build level. To present something for one client and hide for other. In Swift projects we have Swift Compiler — Other Flags where we can define flags (by adding line with -D prefix like: -DOUR_FLAG in build configuration). Moreover we are restricted to…

Sometimes we need to know how long our code is executing. Mostly for debug purposes. If we have that knowledge, we can perform some steps to optimize algorithms or find bottlenecks in our code. …