The other powerful debugging tool, which you should already be familiar with, is the console log. Console logs can be used to log all types of information, including:
Operation results
Activities
Performance measurement
To log a statement to the console, you can use one of these functions:
printdebugPrint
Both of these functions accept any type.
To provide custom text formatting for print functions, you must conform to the CustomStringConvertible protocol, and for debugPrint, the CustomDebugStringConvertible protocol. Both of these protocols require the implementation of only one property. Let's create a simple Person type and implement custom log formatting:
struct Person {
let name: String
let age: Int
extension Person: CustomStringConvertible, CustomDebugStringConvertible {
// CustomStringConvertible
var description: String {
return "Name: \(name)"
}
// CustomDebugStringConvertible
var debugDescription: String {
return "Name: \(name) age: \(age)"...