整数转换的不兼容指针，将“ NSString *”发送到“ BOOL”类型的参数（又名“ signed char”）

Question

This is the mistake:

incompatible pointer to integer conversion sending 'NSString*' to parameter of type 'BOOL' (aka 'signed char')

I don't know what to do. Please show me my mistake.

{



NSString *post =[NSString stringWithFormat:@"username=%@&password=%@",Name.text, Passwort.text];

NSString *hostStr = @"www....de.php";
hostStr = [hostStr stringByAppendingString:post];
NSData *dataURL =  [NSData dataWithContentsOfURL: [ NSURL URLWithString: hostStr ]];
NSString *serverOutput = [[NSString alloc] initWithData:dataURL encoding: NSASCIIStringEncoding];






    BOOL loggedIn = [serverOutput isEqualToString: @"YES"];
    if (loggedIn)
    {
        [_LOGIN setEnabled:@"YES"];
    }
    else
    {
        [_LOGIN setEnabled:@"NO"];
        UIAlertView *alertsuccess = [[UIAlertView alloc] initWithTitle:@"Error" message:@"Benutzername oder Passwort falsch"

                                                              delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
    }

}

Answer 1

_LOGIN.enabled = loggedIn;
if (!loggedIn)
{
    UIAlertView *alertsuccess = [[UIAlertView alloc] ...];
}

Answer 2

Here :

if (loggedIn)
{
    [_LOGIN setEnabled:@"YES"];
}
else
{
    [_LOGIN setEnabled:@"NO"];
    UIAlertView *alertsuccess = [[UIAlertView alloc] initWithTitle:@"Error" message:@"Benutzername oder Passwort falsch"

                                                          delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
}

Don't use @"YES" or @"NO" when you call setEnabled method from the _LOGIN object. You should use YES OR NO :

[_LOGIN setEnabled:YES];

setEnbaled method need a boolean value as parameter, and when you sent @"YES" you send a string value to the method, that is not correct (since the method need boolean value).

Answer 3

[_LOGIN setEnabled:@"YES"];

Should be

[_LOGIN setEnabled:YES];

You are using an NString to set what I assume is a BOOL value. The same also applies to the bit where you set it as NO also.