Question

我以编程方式创建UITextField，将其添加到视图中，然后通过调用

开始编辑

    [textField becomeFirstResponder];

但问题是这个调用触发器调用textFieldDidEndEditing：delegate方法。堆栈跟踪指向[textField _resignFirstResponder]，由becomeFirstResponder调用。这发生在模拟器和iOS 7上。我该如何避免这种情况？这引起了很多问题，因为我不希望在没有键盘被解雇的情况下调用textFieldDidEndEditing:。

编辑：以下是我创建UITextField的方法。

    UITextField *titleField = [[[UITextField alloc] init] autorelease];

     [titleField addTarget:self action:@selector(textFieldDidChange:) forControlEvents:UIControlEventEditingChanged];
     titleField.textColor = [UIColor colorWithWhite:1.f alpha:0.8];
     titleField.font = [UIFont fontWithName:@"HelveticaNeue-Medium" size:40.f];
     titleField.textAlignment = NSTextAlignmentCenter;
     titleField.borderStyle = UITextBorderStyleBezel;
     titleField.autocorrectionType = UITextAutocorrectionTypeNo;
    //   titleField.borderStyle = UITextBorderStyleLine;
     titleField.frame = CGRectMake(0, 0, 200, 80);
     titleField.center = self.previewView.center;
     titleField.delegate = self;


     NSDictionary *titleDictionary = [self titleDictionary];

     if (titleDictionary) {
        titleField.text = [titleDictionary objectForKey:kTitleStringKey];
        NSString *fontName = [titleDictionary objectForKey:kTitleFontNameKey];
        CGFloat fontSize = [[titleDictionary objectForKey:kTitleFontSizeKey] floatValue];
        titleField.font = [UIFont fontWithName:fontName size:fontSize];
        NSData *textColorData = (NSData *)[titleDictionary objectForKey:kTitleTextColorKey];
        titleField.textColor = [NSKeyedUnarchiver unarchiveObjectWithData:textColorData];

        CGSize size = [titleField.text sizeWithFont:titleField.font];
        titleField.frame = CGRectMake(0, 0, size.width + 40, 80);
        titleField.center = self.previewView.center;
     }

     [self.view addSubview:titleField];
     [titleField becomeFirstResponder];

Answer 1

好的，我找到了。我有一个UILongPressGestureRecognizer触发添加UITextField例程，并且在长按时偶然调用两次（需要找出原因，但它是一个单独的问题）。所以，第一次调用响应者被叫了两次。

UITextField成为FirstResponder触发_resignFirstResponder

1 个答案: