CODEWITHSUNDEEP
iosswiftuiview
Nerdy Bunz
Nerdy Bunz

Reputation: 7447

view.bounds.size.height -vs- view.bounds.height -- Any Difference?

I've noticed that in IOS X-Code using (Swift 4.0), I can ask for the height of a view, V, in at least these two ways:

V.bounds.size.height

and...

V.bounds.height

Is there any actual difference between these two?

I did the option-click thing (which give different definitions, but don't explain any practical difference or reason for one over the other)... and stackoverflow... but here on stackoverflow, all the results are discussing the difference between bounds and frame... which is NOT what I'm asking.

Upvotes: 2

Views: 1637

Answers (4)

Ahmad Abbas
Ahmad Abbas

Reputation: 131

V.bounds.height is only a GET Property. You Can't set a value for this property.

Example: 

self.view.bounds.height = 5

This error message results...

Cannot assign to property: 'height' is a get-only property

If you want to assign a value to this property, then you can write...

self.view.bounds.size.height = 5

So you can set value to this object. Have a look at here.

Upvotes: 6

Vlad Rusu
Vlad Rusu

Reputation: 1479

In addition to the fact that view.bounds.height is readonly, there is another difference: if you have negative width/height, view.bounds.height will return you the normalized value (the positive one), while view.bounds.size.height will return the real value. These getters are the equivalent of the CGRectGetWidth() CGRectGetHeight() from Obj-C. All these getters from CGRect struct (widht, height, minX, minY...) are returning the normalized values of the CGRect's dimensions and they are recommended in case you want to use them in frame computations.

Upvotes: 2

dahiya_boy
dahiya_boy

Reputation: 9503

Actually V.bounds.size.height, height have both get-set property and where as in V.bounds.height, height is only getter property and it always return you height of the rectangle.

For the getter perspective both are same.

Upvotes: 1

CZ54
CZ54

Reputation: 5588

There is small difference. view.bounds.height is a shortcut. You cannot edit it :

view.bounds.height = 150 won't work, but view.bounds.size.height = 150 will.

Upvotes: 1

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