在 Objective C 中,您可以使用以下命令记录正在调用的方法:
NSLog(@"%s", __PRETTY_FUNCTION__)
通常这在日志记录宏中使用。
虽然 Swift 不支持宏(我认为),但我仍然想使用包含被调用函数名称的通用日志语句。这在斯威夫特中可能吗?
Update:我现在使用这个全局函数进行日志记录,可以在这里找到:https://github.com/evermeer/Stuff#print https://github.com/evermeer/Stuff#print您可以使用以下命令安装:
pod 'Stuff/Print'
这是代码:
public class Stuff {
public enum logLevel: Int {
case info = 1
case debug = 2
case warn = 3
case error = 4
case fatal = 5
case none = 6
public func description() -> String {
switch self {
case .info:
return "❓"
case .debug:
return "✳️"
case .warn:
return "⚠️"
case .error:
return "????"
case .fatal:
return "????"
case .none:
return ""
}
}
}
public static var minimumLogLevel: logLevel = .info
public static func print<T>(_ object: T, _ level: logLevel = .debug, filename: String = #file, line: Int = #line, funcname: String = #function) {
if level.rawValue >= Stuff.minimumLogLevel.rawValue {
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "MM/dd/yyyy HH:mm:ss:SSS"
let process = ProcessInfo.processInfo
let threadId = "?"
let file = URL(string: filename)?.lastPathComponent ?? ""
Swift.print("\n\(level.description()) .\(level) ⏱ \(dateFormatter.string(from: Foundation.Date())) ???? \(process.processName) [\(process.processIdentifier):\(threadId)] ???? \(file)(\(line)) ⚙️ \(funcname) ➡️\r\t\(object)")
}
}
}
你可以这样使用:
Stuff.print("Just as the standard print but now with detailed information")
Stuff.print("Now it's a warning", .warn)
Stuff.print("Or even an error", .error)
Stuff.minimumLogLevel = .error
Stuff.print("Now you won't see normal log output")
Stuff.print("Only errors are shown", .error)
Stuff.minimumLogLevel = .none
Stuff.print("Or if it's disabled you won't see any log", .error)
这将导致:
✳️ .debug ⏱ 02/13/2017 09:52:51:852 ???? xctest [18960:?] ???? PrintStuffTests.swift(15) ⚙️ testExample() ➡️
Just as the standard print but now with detailed information
⚠️ .warn ⏱ 02/13/2017 09:52:51:855 ???? xctest [18960:?] ???? PrintStuffTests.swift(16) ⚙️ testExample() ➡️
Now it's a warning
???? .error ⏱ 02/13/2017 09:52:51:855 ???? xctest [18960:?] ???? PrintStuffTests.swift(17) ⚙️ testExample() ➡️
Or even an error
???? .error ⏱ 02/13/2017 09:52:51:855 ???? xctest [18960:?] ???? PrintStuffTests.swift(21) ⚙️ testExample() ➡️
Only errors are shown