我有一个代码块,需要执行2个需要尝试的语句.最好嵌套try,而每个都有自己的do {} catch {}
@H_403_1@do {
try thingOne()
do {
try thingTwo()
} catch let error as NSError {
//handle this specific error
}
} catch let error as NSError {
//handle the other specific error here
}
…或者将try在一个do block中连续运行？
@H_403_1@do { try thingOne() try thingTwo() } catch let error as NSError { //do something with this error }第二种情况似乎比第一种情况更容易阅读,但是如果其中任何一种会引发错误,那么捕获将会起作用？
我认为第二种方式是更好
假设我有这两个功能
@H_403_1@func thingOne() throws{ print("Thing 1") throw CustomError.Type1 } func thingTwo() throws{ print("Thing 2") throw CustomError.Type2 } enum CustomError:ErrorType{ case Type1 case Type2 }然后我会这样称呼
@H_403_1@do { try thingOne() try thingTwo() } catch CustomError.Type1 { print("Error1") } catch CustomError.Type2{ print("Error2") } catch { print("Not known\(error) ") }这将记录
@H_403_1@Thing 1 Error1如果thingOne()没有抛出错误,它将记录
@H_403_1@Thing 1 Thing 2 Error2