AS3窗体字段聚焦/模糊功能

Posted 2021-02-26

Paste this into your AS file to add focus and blur events to your text/form fields. If your field contains YOUR DEFAULT MESSAGE when focus is brought to it, it will erase itself, to be ready for text entry. If focus is lost while the field is completely empty, the default message will return.

with (PATHTO.YOURTEXTFIELD_INSTANCE_NAME) {
    addEventListener(FocusEvent.FOCUS_IN, focusField);
    addEventListener(FocusEvent.FOCUS_OUT, blurField);
}
 
private function focusField(e:Event) {
    switch (e.currentTarget.name) {
        case "YOURTEXTFIELD_INSTANCE_NAME" :
        if(e.currentTarget.text == "YOUR DEFAULT MESSAGE") e.currentTarget.text = "";
        break;
 
    }
}
private function blurField(e:Event) {
    switch (e.currentTarget.name) {
        case "YOURTEXTFIELD_INSTANCE_NAME" :
        if(e.currentTarget.text == "") e.currentTarget.text = "YOUR DEFAULT MESSAGE";
        break;
 
    }
}