'no calls to throwing functions occur within 'try' expression [warning] in swift 3
13,992
Solution 1
The deleteObject
method doesn't throw. Remove the Do-Catch
block and the warning will go away. The warning seems pretty self explanatory.
Solution 2
Make sure that the method that you are invoking after try
throws.
Example:
func someThrowingFunction() throws -> Int {
// ...
}
let x = try? someThrowingFunction()
let y: Int?
do {
y = try someThrowingFunction()
} catch {
y = nil
}
more information about that here: ErrorHandling
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Author by
caldera.sac
Updated on June 04, 2022Comments
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caldera.sac almost 2 years
I' trying to delete and object from core data and I tried it within try catch like below.
do { try self.managedContext.deleteObject(self.productList[indexPath.row]) } catch let error as NSError { print("something wrong with the delete : \(error.userInfo)") }
it say
'no calls to throwing functions occur within 'try' expression
and'catch block is unreachable because no errors are throw in 'do' block
. following image give you more idea.why is this. I have no idea. how to solve this. hope your help.
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Alexander over 7 yearsThe error message tells you literally everything you need to know...
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