What methods are used to find errors in synchronous tasks and how to implement them?

To find errors in synchronous tasks in iOS, you can use the following methods:

• Debugging with breakpoints — setting breakpoints in the code for step-by-step analysis of execution.
• Logging — outputting variable values and program state to the console using print or os_log.
• Using exceptions and error handling — checking and handling errors with do-catch blocks.
• Unit testing — writing tests to verify the correctness of functions.

Example of error handling in a synchronous function:

enum FileError: Error {
    case fileNotFound
}

func readFile(named name: String) throws -> String {
    guard let path = Bundle.main.path(forResource: name, ofType: "txt") else {
        throw FileError.fileNotFound
    }
    return try String(contentsOfFile: path)
}

// Usage

do {
    let content = try readFile(named: "data")
    print(content)
} catch {
    print("Error reading file: \(error)")
}

Thus, errors can be caught and analyzed during the execution of synchronous tasks.