Question

我正在为Iphone的SMS应用程序工作.. 现在我想在longpress上更改聊天气泡的图像（就像我复制内容一样）..

我有这个代码..

if (longPressRecognizer.state == UIGestureRecognizerStateBegan) 
    {


        [self becomeFirstResponder];

        //NSIndexPath *pressedIndexPath = [tblOutgoingMessagesRecords indexPathForRowAtPoint:[longPressRecognizer locationInView:tblOutgoingMessagesRecords]];

        NSIndexPath *pressedIndexPath = [tblOutgoingMessagesRecords indexPathForCell:(UITableViewCell *)longPressRecognizer.view];
        if (pressedIndexPath && (pressedIndexPath.row != NSNotFound) && (pressedIndexPath.section != NSNotFound)) 
        {
            [self becomeFirstResponder];
            NSLog(@" Presssed on Copy ");

我只想将聊天气泡颜色更改为蓝色，而我则将其复制为副本。就像在iPhone默认已完成我想做同样的...任何人都可以帮助我...

Answer 1

您似乎必须检查状态是否为 UIGestureRecognizerStateRecognized 以更改聊天气泡的颜色，

if (longPressRecognizer.state == UIGestureRecognizerStateRecognized) {

    // Change Chat bubble's color to blue
}

Answer 2

长按手势开始状态时检查颜色为红色

if (longPressRecognizer.state == UIGestureRecognizerStateBegan) 
{


    [self becomeFirstResponder];
   // change image from  here
    //NSIndexPath *pressedIndexPath = [tblOutgoingMessagesRecords indexPathForRowAtPoint:[longPressRecognizer locationInView:tblOutgoingMessagesRecords]];

    NSIndexPath *pressedIndexPath = [tblOutgoingMessagesRecords indexPathForCell:(UITableViewCell *)longPressRecognizer.view];
    if (pressedIndexPath && (pressedIndexPath.row != NSNotFound) && (pressedIndexPath.section != NSNotFound)) 
    {
        [self becomeFirstResponder];
        NSLog(@" Presssed on Copy ");
  }
}
else  if (longPressRecognizer.state == UIGestureRecognizerStateChanged)
 {

    //load original  image here...

   }

如何在UILongPressGestureRecognizer上更改图像？

2 个答案: