Weakly Summary

Should not modify global variable in function

If you have a function that returns a view, that’s great, but it should not, as a side product, modify a global variable. Functions should only change variables within their own scope and return a result.
The better way to code this is:

self.lockView = [self createLockView];
[self.view addSubview:self.lockView];

Globals are "bad" avoid them if you can. 

Apple 推荐使用

-(instancetype)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil 

因为这个是designated initializer;

Change the font of UITextView’s linkTextAttributes

We only have access to change the font color of UITextView’s linkTextAttributes, if we’d like to change the font of the link, we should just add attribute to the attributedString, for example

textView.linkTextAttributes = @{NSForegroundColorAttributeName : [UIColor linkColor]}; 

NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:text attributes:@{NSForegroundColorAttributeName : [UIColor defaultPanelBodyColor], NSFontAttributeName : [UIFont defaultPanelBodyFont]}]; 

[attributedString addAttributes:@{NSFontAttributeName : [UIFont linkTypeButtonFont]} range:linkRange];

[attributedString addAttributes:@{NSLinkAttributeName: kDefaultURL} range:linkRange];