ios-summary-point

注意： you should alloc init the object， the property just define the pointer，the actual object you should alloc and init why the UI element not needed？ because the UI element init when rendering the storyboard

the difference about ViewDidLoad and viewDidAppear: the autolayout result can be done in view did appear. 在didload中的view的大小还没有计算出来？在didapper中已经计算出来了。

（1）字体的问题：change hex color to UIcolor：hex color to UIColor （2）render view的问题