Check empty string in Swift?

Question

In Objective C, one could do the following to check for strings:

if ([myString isEqualToString:@\"\"]) {
    NSLog(@\"m         


        

Answer 1

You can also use an optional extension so you don't have to worry about unwrapping or using == true:

extension String {
    var isBlank: Bool {
        return self.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty
    }
}
extension Optional where Wrapped == String {
    var isBlank: Bool {
        if let unwrapped = self {
            return unwrapped.isBlank
        } else {
            return true
        }
    }
}

Note: when calling this on an optional, make sure not to use ? or else it will still require unwrapping.