initWithNibName 大多用于VC和Xib連起來 ,延遲加載,等vc顯示出來的時候再初始化視圖
loadNibNamed 大多是那種view和xib連起來 創(chuàng)建出來的時候所有視圖已經(jīng)初始化好了
when using loadNibNamed:owner:options:, the File's Owner should be NSObject, the main view should be your class type, and all outlets should be hooked up to the view, not the File's Owner
initWithCoder :initWithNibName 和 loadNibNamed 都會調(diào)用
awakeFromNib :xib文件加載的時候會觸發(fā)