触摸文本输入略微向上移动屏幕本机

Question

我正在使用TextInput，但是当我点击TextInput时，我的屏幕会稍微向上移动。

如何阻止这种情况发生？

这是我的TextInput

的代码

<TextInput style={{ height:45, borderBottomColor: '#FFFFFF', flex:1,}}
    placeholder="Email"
    keyboardType="email-address"
    underlineColorAndroid='black'
    onChangeText={(email) => this.setState({email})}/>

Answer 1

这是我的代码

    function readURL(input,index) {
        if (input.files && input.files[0]) {
          var reader = new FileReader();
          reader.onload = function (e) {

               $('#user_img_preview').attr('src', e.target.result);  // You can show image preview before submit


          }
          reader.readAsDataURL(input.files[0]);
        }
    }
   $("#user_img").change(function (e) {

      // Check file is image or not
      var file, img;
      if ((file = this.files[0])) {

        var fileName = this.files[0]['name'];
        var idxDot = fileName.lastIndexOf(".") + 1;
        var extFile = fileName.substr(idxDot, fileName.length).toLowerCase();
        if (extFile=="jpg" || extFile=="jpeg" || extFile=="png"){

          readURL(this,1); 
          img = new Image();
          img.onload = function () {

              if(this.width != 100 || this.height != 110) {
                alert('Please upload proper image with exact size : 100 x 110');
              } 
          };
          img.src = _URL.createObjectURL(file);

        }else{

          alert('Only jpg/jpeg and png files are allowed!');

        }

      }
  });