拉伸，

    UIImage* image = [[UIImageimageNamed:@"conversation_field_bg.png"] stretchableImageWithLeftCapWidth:14topCapHeight:14];

        [self.bgButtonsetBackgroundImage:[[UIImageimageNamed:@"conversation_bg.png"] stretchableImageWithLeftCapWidth:22topCapHeight:30] forState:UIControlStateNormal];

 

 

- (void)textViewDidChange:(UITextView *)textView

{

    

    CGSize contentSize = textView.contentSize;

    CGRect inputViewRectOrigin = self.inputView.frame;

    if (contentSize.height > 80) {

        contentSize.height = 80;

        self.sendTextView.scrollEnabled = YES;

    }

    else {

        self.sendTextView.scrollEnabled = NO;

    }

 

    

    self.inputView.frame = CGRectMake(inputViewRectOrigin.origin.x, inputViewRectOrigin.origin.y + inputViewRectOrigin.size.height - contentSize.height, inputViewRectOrigin.size.width,contentSize.height);

    self.sendButton.frame = CGRectMake(self.sendButton.frame.origin.x,

                                       self.inputView.frame.size.height -

                                       self.sendButton.frame.size.height,

                                       self.sendButton.frame.size.width,

                                       self.sendButton.frame.size.height);

    self.inputBGImageView.frame = CGRectMake(inputBGImageViewFrame.origin.x, inputBGImageViewFrame.origin.y, inputBGImageViewFrame.size.width,contentSize.height);

    self.sendTextView.frame = CGRectMake(inputTextView.origin.x, inputTextView.origin.y, inputTextView.size.width, contentSize.height );

  

    self.inputView.backgroundColor = [UIColorredColor];

    self.resignButton.frame = CGRectMake(0, 0, 320,inputViewRectOrigin.origin.y);

    

}