UIView LifeCycle

UIView LifeCycle

- (void)didMoveToSuperview {
    [super didMoveToSuperview];
    NSLog(@"didMoveToSuperview");
}

- (void)awakeFromNib {
    [super awakeFromNib];
    NSLog(@"awakeFromNib");
}

- (void)willMoveToWindow:(UIWindow *)newWindow {
    [super willMoveToWindow:newWindow];
    NSLog(@"willMoveToWindow");
}

- (void)didMoveToWindow {
    [super didMoveToWindow];
    NSLog(@"didMoveToWindow");
}

- (void)layoutSubviews {
    [super layoutSubviews];
    NSLog(@"layoutSubviews");
}

- (void)drawRect:(CGRect)rect {
    [super drawRect:rect];
    NSLog(@"drawRect");

}

2016-05-05 12:16:40.252 test[3087:304865] didMoveToSuperview

2016-05-05 12:16:40.254 test[3087:304865] willMoveToWindow

2016-05-05 12:16:40.254 test[3087:304865] didMoveToWindow

2016-05-05 12:16:40.256 test[3087:304865] layoutSubviews

2016-05-05 12:16:40.256 test[3087:304865] drawRect

- awakeFromNib 이 호출 안되는 이유?

It sends an awakeFromNib message to the appropriate objects in the nib file that define the matching selector:

- In Mac OS X, this message is sent to any interface objects that define the method.

   It is also sent to the File’s Owner and any proxy objects that define it as well.

- In iPhone OS, this message is sent only to the interface objects that were instantiated by the nib-loading code.

   It is not sent to File’s Owner, First Responder, or any other proxy objects.

---

UIView LifeCycle 상세

1. initWithCoder:

     layerClass

     setNeedsDisplay

     addConstraints:

          addConstraint: (can happen multiple times)

2. willMoveToSuperview:

3. invalidateIntrinsicContentSize

4. didMoveToSuperview

5. awakeFromNib

6. willMoveToWindow:

7. needsUpdateConstraints

8. didMoveToWindow

9. setNeedsLayout

10. updateConstraints

      intrinsicContentSize

11. layoutSubviews (can happen multiple times)

12. drawRect:

---

UIView 에서 실제 사이즈가 잡히는 시간 테스트 결과값

- (void)didMoveToSuperview {
    [super didMoveToSuperview];
    NSLog(@"didMoveToSuperview : %f, %f", _smallView.frame.size.width, _smallView.frame.size.height);
}

- (void)awakeFromNib {
    [super awakeFromNib];
    NSLog(@"awakeFromNib : %f, %f", _smallView.frame.size.width, _smallView.frame.size.height);
}

- (void)willMoveToWindow:(UIWindow *)newWindow {
    [super willMoveToWindow:newWindow];
    NSLog(@"willMoveToWindow : %f, %f", _smallView.frame.size.width, _smallView.frame.size.height);
}

- (void)didMoveToWindow {
    [super didMoveToWindow];
    NSLog(@"didMoveToWindow : %f, %f", _smallView.frame.size.width, _smallView.frame.size.height);
}

- (void)updateConstraints {
    [super updateConstraints];
    NSLog(@"updateConstraints : %f, %f", _smallView.frame.size.width, _smallView.frame.size.height);
}

- (void)layoutSubviews {
    [super layoutSubviews];
    NSLog(@"layoutSubviews : %f, %f", _smallView.frame.size.width, _smallView.frame.size.height);
}

- (void)drawRect:(CGRect)rect {
    [super drawRect:rect];
    NSLog(@"drawRect : %f, %f", _smallView.frame.size.width, _smallView.frame.size.height);

}

2016-05-05 12:28:55.772 test[3673:371030] didMoveToSuperview : 240.000000, 20.000000

2016-05-05 12:28:55.773 test[3673:371030] willMoveToWindow : 240.000000, 20.000000

2016-05-05 12:28:55.774 test[3673:371030] didMoveToWindow : 240.000000, 20.000000

2016-05-05 12:28:55.775 test[3673:371030] updateConstraints : 240.000000, 20.000000

2016-05-05 12:28:55.776 test[3673:371030] layoutSubviews : 240.000000, 20.000000

2016-05-05 12:28:55.776 test[3673:371030] drawRect : 20.000000, 20.000000

참고자료

https://bradbambara.wordpress.com/2015/01/18/object-life-cycle-uiview/