-2

当尝试使用 IF 语句从通过蓝牙接收到的数据中调用方法时，它不会结合

那里还有我需要删除的额外数据包吗？

-(IBAction) btnSend:(id) sender
{
    //---convert an NSString object to NSData---
    NSData* data;
    NSString *str = [NSString stringWithString:txtMessage.text];
    data = [str dataUsingEncoding: NSASCIIStringEncoding];
    [self mySendDataToPeers:data];
}

- (void) receiveData:(NSData *)data
            fromPeer:(NSString *)peer
           inSession:(GKSession *)session
             context:(void *)context {

    //---convert the NSData to NSString---
    NSString* str;
    str = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding];

    NSString* test = str;

    NSString* up = @"up";

    if (test == up)
    {
        [self up];


    }
    else
    {
        str = @"Not Vaild";
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Data received"
                                                        message:str
                                                       delegate:self
                                              cancelButtonTitle:@"OK"
                                              otherButtonTitles:nil];
        [alert show];
    }
4

1 回答 1

1

代替

if (test == up)

和

if ([test isEqualToString:up])
于 2013-06-07T11:22:48.437 回答