gistfile1.m

// MyViewController inherts from UIViewController 
@interface MyViewController()

// ---------QUESTIONS---------
// 1. Should you do this, only to avoid casting later when you need to access MyCustomView specific properties?
// 2. How does the compiler treat this property (and the backing ivar) that's re-declared at the inheriting class level?
// Does it shadow the version that exists at the UIViewController level?
// 3. Wouldn't this cause a leak? 

@property (nonatomic, strong) MyCustomView *view; 

@end

@implementation MyViewController

- (void)viewDidLoad {
  self.view = [[MyCustomView alloc] initWith..];  // this is ok
  self.view.button.titleLabel = @"some label" // button is automatically created in MyCustomView constructor
}
@end

// MyCustomView inherits from UIView
@interface MyCustomView : UIView 
@property (nonatomic, weak) UIButton *button;
@property (nonatomic, weak) UILabel *label;
@end

@implementation MyCustomView

- (instancetype)init {
  self = [super init];
  if (self) {
    _button = [[UIButton alloc] init.. ];
    _label = [[UILabel alloc] init.. ];
  }
}
@end