- field未显示label——field只在layout为form时,显示label
- 发现应用总是去连www.sencha.com——未设置Ext.BLANK_IMAGE_URL
- 没使用xtype来延迟初始化(lazy instantiation)——浪费内存
- getXTypes()没有得到继承结构——扩展类是忘记注册 Ext.reg()
(例如
ntbmsBasicCustomFormPanel扩展了FormPanel,调用getXTypes()应该得到 ——component/box/container/panel/form/ntbmsBasicCustomFormPanel
但是只得到——ntbmsCustomFormPanel
)
5. Ext can't automatically detect if a vertical scrollbar will appear, so the only solution is to reserve room for the vertical scrollbar (e.g. by using a scrollOffset or a negative anchor in a layout).
layoutConfig: {scrollOffset: Ext.getScrollBarWidth()}
或者
defaults: {anchor: '-' + Ext.getScrollBarWidth()}
参看:
http://www.sencha.com/forum/showthread.php?116524-Understanding-scrollbars&highlight=scrollOffset