英文:
how can I create a function with throw and return a value in swift?
问题
我是新手使用Swift。我尝试理解带有"throw"的函数。是否可能让函数抛出异常并同时返回一个值？
func throwAndReturnString() {
guard let response = internalFunction else {
throw "response should not be nil"
}
return response.label
}
英文:
I am new on swift. I try to understand the function with throw. is it possible to make the function throw and at the same function return a value?
func throwAndReturnString() {
guard let response = internalFunction else {
throw "response should not nil"
}
return response.label
}
答案1
得分: 1
以下是翻译好的部分：
要使一个可以throw的函数，需要在其前加上throws修饰词，并且在签名中添加返回类型。
func throwAndReturnString() throws -> String { //<<--HERE
这假设label是一个String。
英文:
To have a function that can throw it needs to be decorated with throws and to return the type needs to be added to the signature.
func throwAndReturnString() throws -> String { //<<--HERE
This assumes that label is a String
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