Question

我有一个Picturebox可以用（W，A，S，D）键移动，但是它非常不稳定，您一次只能按下一个键。还有其他方法可以使“精灵”更平滑地移动吗？

这是我尝试过的代码：

    private void Form1_KeyPress(object sender, KeyPressEventArgs e)
    {
        int offset = 10;
        if (e.KeyChar == 'a')
        {
            pictureBox1.Location = new Point(pictureBox1.Location.X - offset, pictureBox1.Location.Y);
        }
        else if (e.KeyChar == 'w')
        {
            pictureBox1.Location = new Point(pictureBox1.Location.X, pictureBox1.Location.Y - offset);
        }
        else if (e.KeyChar == 's')
        {
            pictureBox1.Location = new Point(pictureBox1.Location.X, pictureBox1.Location.Y + offset);
        }
        else if (e.KeyChar == 'd')
        {
            pictureBox1.Location = new Point(pictureBox1.Location.X + offset, pictureBox1.Location.Y);
        }
    }

Answer 1

您最好在内部更新位置，而不是通过调用type TextFieldData = { value: string } type TextField = { type: 'text', data: TextFieldData } type SelectFieldData = { options: string[], selectedValue: string } type SelectField = { type: 'select', data: SelectFieldData } type FormField = TextField | SelectField function renderTextField(props: TextFieldData) {} function renderSelectField(props: SelectFieldData) {} const fieldMapping = { text: renderTextField, select: renderSelectField, } // This won't work! function renderFieldDoesNotWork(field: FormField) { const renderFn = fieldMapping[field.type] // Type 'TextFieldData' is missing the following properties from type 'SelectFieldData': options, selectedValue renderFn(field.data) } // This works function renderFieldWorks(field: FormField) { if (field.type === 'text') { const renderFn = fieldMapping[field.type] renderFn(field.data) } else if (field.type === 'select') { const renderFn = fieldMapping[field.type] renderFn(field.data) } }

为其分配新值

请参见https://docs.microsoft.com/en-us/dotnet/api/system.drawing.point.offset?view=netframework-4.8#System_Drawing_Point_Offset_System_Int32_System_Int32_

Answer 2

要延伸到Babak并回答您的另一部分（一次只按一个键），请将您的else if更改为一系列if语句。如果使用else，则一旦其中一个为真，它就会中断序列，这意味着一旦按下一个键，就不会寻找其他键。

如何在C＃中更平稳地移动“精灵”

2 个答案: