leafgw的专栏

【报错】“Use Legacy Swift Language Version” (SWIFT_VERSION) is required to be configured correctly for targets which use Swift. Use the [Edit > Convert > To Current Swift Syntax…] menu to choose a Swift v

本次升级由swift2.3->swift4.0swift2.3升级swift3.0pravite -> fileprivatePublice -> open枚举更换小写方法名更精简，后面括号移除gcd方法改变gcdtimer创建方法返回值类型变了 DispatchSource -> DispatchSourceTimersetTimer(start: Dis