Convert NSMutableAttributedString to NSString

You can't use a cast to convert an object from one type to another. Use the provided method:

label1.text = [string1 string];

Better yet, use the attributed string:

label1.attributedText = string1

NSAttributtedString includes a .string property. From there, you can take NSString without attributes.

So:

NSAttributtedString* someString;
NSString* string = someString.string;