From:  `@property (nonatomic, weak) TTMapView *_Nullable mapView`
To:  `@property(nonatomic, weak) TTMapView *_Nullable mapView`
From:  `@property (nonatomic, weak, readwrite) UIButton *_Nullable centerButton;`
To:  `@property (nonatomic, weak, readonly) UIButton *_Nullable centerButton;`
From:  `weak var centerButton: UIButton? { get set }`
To:  `weak var centerButton: UIButton? { get }`
From:  `@property (nonatomic, weak, readwrite) UIButton *_Nullable compassButton;`
To:  `@property (nonatomic, weak, readonly) UIButton *_Nullable compassButton;`
From:  `weak var compassButton: UIButton? { get set }`
To:  `weak var compassButton: UIButton? { get }`