constraintsWithVisualFormat set same Y position for all the views - ios

Question

I am just playing with constraintsWithVisualFormat but not able to figure out how to do.
I have two Views placed together with 10 pix margin in horizontal. and Y position will be the same for the both of the views.
I have tried the following things.
[self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:#"H:|-10-[view1(==100)]-10-[view2(==100)]" options:0 metrics:nil views:views]];
[self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:#"V:|-10-[view1(==100)]-[view2(==100)]" options:0 metrics:nil views:views]];
Horizontal Constraint : 10 pix left margin from superview - 100 width
of view1- 10 pix margin - 100 width of view2
Vertical Constraint : 10 pix top from superview - 100 height of view1-
100 height of view2
Problem
The second view Y position start after the view1 i want the same Y position for the both of the view.
Please if possible explain the answer

Answer 1

Mark '-' is margin 8px in VisualFormatLanguage.
Try this.
`[self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:#"H:|-10-[view1(==100)]-10-[view2(==100)]" options:0 metrics:nil views:views]];
[self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:#"V:|-10-[view1(==100)]" options:0 metrics:nil views:views]];
[self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:#"V:|-10-[view2(==100)]" options:0 metrics:nil views:views]];`

Answer 2

Horizontal layout with all bottom alignment:
[NSLayoutConstraint constraintsWithVisualFormat:#"H:|-10-[view1(==100)]-10-[view2(==100)]"
options:NSLayoutFormatAlignAllBottom
metrics:nil
views:views]
Vertical layout untouched:
[NSLayoutConstraint constraintsWithVisualFormat:#"V:|-10-[view1]"
options:0
metrics:nil
views:views]
Please also note that two approaches -- constrain each view at top of superview vs. align all views around common top/bottom/baseline/centery differ in obvious way. And that other answer cannot address the case of center-alignment, btw.
UPD: Here is a complete working example of using alignment options in layout:
- (void)applicationDidFinishLaunching:(NSNotification *)notification
{
NSTextField *view1 = [[NSTextField alloc] initWithFrame:NSZeroRect];
NSTextField *view2 = [[NSTextField alloc] initWithFrame:NSZeroRect];
NSView *contentView = [self.window contentView];
NSDictionary *views = NSDictionaryOfVariableBindings(view1, view2);
[view1 setTranslatesAutoresizingMaskIntoConstraints:NO];
[view2 setTranslatesAutoresizingMaskIntoConstraints:NO];
[contentView addSubview:view1];
[contentView addSubview:view2];
[contentView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:#"H:|-[view1(==100)]-[view2(==100)]"
options:NSLayoutFormatAlignAllBottom
metrics:nil
views:views]];
[contentView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:#"V:|-[view1]"
options:0
metrics:nil
views:views]];
}