Summarize some common block-related retain cycle patterns.

- (void)presentNewViewController {
UIViewController *newVC = [UIViewController new];
newVC.completion = ^ {
newVC.title = @"some_title_after_completion";
};
[self presentViewController: newVC animated: YES];
}

In the above example, the retain cycle is newVC -> completion -> newVC

2. Superficial class method

@implementation…

This is to post is to keep a record of the know-hows and gotchas while learning and developing Flutter projects.

Each MaterialApp (or WidgetApp in general) will create one Navigator, which represents a navigation stack. In a general app, where there are multiple bottom tab bar items, each tab…

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