Swift Language Functions Throwing Errors
Example
If you want a function to be able to throw errors, you need to add the throws keyword after the parentheses that hold the arguments:
func errorThrower()throws -> String {}
When you want to throw an error, use the throw keyword:
func errorThrower()throws -> String {
if true {
return "True"
} else {
// Throwing an error
throw Error.error
}
}
If you want to call a function that can throw an error, you need to use the try keyword in a do block:
do {
try errorThrower()
}
For more on Swift errors: Errors
