ios - Code changes behavior after upgrading sdk? -


i'm trying optimized app ios 7 still target ios 6.

i had 2 textfield email input validate, fails.

i did that:

    if ([email.text isequaltostring:confirm_email.text]) {     //process     }     else{     //display mismatch error    uialertview * alertview = [[uialertview alloc] initwithtitle:@"email mismatch"                                                          message:@"your email not match confirmation!"                                                         delegate:self                                                cancelbuttontitle:@"ok"                                                otherbuttontitles:nil, nil];     [alertview show];     }

now not work in ios 6 ios 7 , display error. didnt touch code, im not sure why behavior changed.

if uitextfield doesn't have user text returns nil on ios 7 empty string (@"") on ios 6. behavior seeing because if either text field in [email.text isequaltostring:confirm_email.text] nil evaluate no.


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