ios - initWithFrame 比 view.frame 快？

Question

我只是好奇，在初始化 UIView 时；我注意到当我调用实例构造函数 -(id)initWithFrame:(CGRect)frame 时，原始构造函数 -(id)init 从未真正被调用，这意味着我必须在两个构造函数中初始化实例变量。这是否意味着调用 -(id)initWithFrame:(CGRect)frame 比调用 UIView *view = [UIView new ]; view.frame = frame;? initWithFrame 选项是否比创建新实例并手动分配其框架更快？我实际上更喜欢做后者以保持程序的一致性。

Answer 1

不，只是 initWithFrame 是 UIView 的指定初始化程序(来自 class reference ):

Discussion

The new view object must be inserted into the view hierarchy of a window before it can be used. If you create a view object programmatically, this method is the designated initializer for the UIView class. Subclasses can override this method to perform any custom initialization but must call super at the beginning of their implementation.