fix bug: UIMessageInputView切换文字和语音的时候高度错误

Author: sumeng

Coding_iOS/Views/UIMessageInputView/UIMessageInputView.m

@@ -120,6 +120,8 @@ - (void)setInputState:(UIMessageInputViewState)inputState{
         }
         _contentView.hidden = _inputState == UIMessageInputViewStateVoice;
         _arrowKeyboardButton.hidden = !_contentView.hidden;
+        
+        [self updateContentViewBecauseOfMedia:NO];
         _arrowKeyboardButton.center = CGPointMake(self.frame.size.width/2, self.frame.size.height/2);
     }
 }
@@ -578,6 +580,9 @@ - (void)updateContentViewBecauseOfMedia:(BOOL)becauseOfMedia{
             _mediaView.frame = mediaFrame;
         }
     }
+    if (_contentView.hidden) {
+        textSize.height = kMessageInputView_Height - 2*kMessageInputView_PadingHeight;
+    }
     CGSize contentSize = CGSizeMake(textSize.width, textSize.height + mediaSize.height);
     CGFloat selfHeight = MAX(kMessageInputView_Height, contentSize.height + 2*kMessageInputView_PadingHeight);