如何实现由按钮控制文本滚动

网络整理 - 08-31

一、比较保守的方法，如果要放到按钮上的效果就onRollOver,别忘了再写个onRollOut配它哦。

以下为引用的内容：

upBtn.onPress = function() {
              onEnterFrame = function () {
                     textHolder.scroll += 2;
              };
       };
upBtn.onRelease = function() {
              delete onEnterFrame;
       };
dnBtn.onPress = function() {
              onEnterFrame = function () {
                     textHolder.scroll -= 2;
              };
       };
dnBtn.onRelease = function() {
              delete onEnterFrame;
       };

二、

以下为引用的内容：

this.createEmptyMovieClip("a_mc", 100);
this.createEmptyMovieClip("c_mc", 200);
down_btn.onPress = function() {
a_mc.onEnterFrame = function() {
  textField_txt.scroll += 1;
};
};
down_btn.onRollOver = function() {
a_mc.onEnterFrame = function() {
  textField_txt.scroll += 3;
};
};
up_btn.onPress = function() {
c_mc.onEnterFrame = function() {
  textField_txt.scroll -= 1;
};
};
up_btn.onRollOver = function() {
c_mc.onEnterFrame = function() {
  textField_txt.scroll -= 3;
};
};
up_btn.onRelease = function() {
delete c_mc.onEnterFrame;
};
up_btn.onRollOut = function() {
delete c_mc.onEnterFrame;
};
down_btn.onRollOut = function() {
delete a_mc.onEnterFrame;
};
down_btn.onRelease = function() {
delete a_mc.onEnterFrame;
};