Question

how to soive this to stop warning message for this? am trying to put error on label. Does try catch really prevent crashing app?

@catch (NSException *ex) {
    errorLbl.text =ex;
}

Answer 1

Instead of trying to catch a crash, you should make sure that code will not crash altogether. However, you can always convert the NSException to NSString

@catch (NSException *ex) {
    errorLbl.text = [NSString stringWithFormat:@"%@",[ex reason]];
}

NSException

@interface NSException : NSObject <NSCopying, NSCoding> {
    @private
    NSString        *name;
    NSString        *reason;
    NSDictionary    *userInfo;
    id               reserved;
}