问题
What is the easiest way to force a crash in Swift?
I would like to use only one line of code (something that I can add quickly).
I don't want to use breakpoints, I actually want the app to crash.
回答1:
Typically you'd use
fatalError()
or
preconditionFailure()
for that.
These do exactly the same: terminating the program, therefore the code after this stamement never gets executed. All of the functions that have this behaviour are annotated with the @noreturn attribute
You can also do something like this:
func getInt() -> Int {
fatalError()
}
The function is supposed to return an Int, but because the program never gets to that point, you don't have to return anything.
回答2:
[0][1]
This tries to access second element of a one element array.
回答3:
You can simply try to access an optional value that has nil value... if you already have a variable declared and it is an optional, just call it (don't forget to unwrap) and it will crash for sure
回答4:
If you have an integer variable, you can multiply it by the integer limit. (Similar method for UInt)
来源：https://stackoverflow.com/questions/32511178/easiest-way-to-force-a-crash-in-swift