I have a custom UITableViewCell with a subview that resizes using Auto Layout. This subview is a toolbar at the bottom of the cell. It has a height of zero when the cell is unselected and grows to 30 in the selected state. The cell toggles between 100 and 130.
Here is the init:
- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
if (self) {
_toolbarView = [[FOToolbarView alloc] init];
_toolbarView.translatesAutoresizingMaskIntoConstraints = NO;
_toolbarView.backgroundColor = [UIColor blueColor];
[self.contentView addSubview: _toolbarView];
[self setNeedsUpdateConstraints];
}
return self;
}
And here are the constraints
- (void)updateConstraints
{
[self.contentView addConstraint: [NSLayoutConstraint constraintWithItem: _toolbarView
attribute: NSLayoutAttributeWidth
relatedBy: NSLayoutRelationEqual
toItem: self.contentView
attribute: NSLayoutAttributeWidth
multiplier: 1.0
constant: 0]];
[self.contentView addConstraint: [NSLayoutConstraint constraintWithItem: _toolbarView
attribute: NSLayoutAttributeLeft
relatedBy: NSLayoutRelationEqual
toItem: self.contentView
attribute: NSLayoutAttributeLeft
multiplier: 1.0
constant: 0]];
[self.contentView addConstraint: [NSLayoutConstraint constraintWithItem: _toolbarView
attribute: NSLayoutAttributeTop
relatedBy: NSLayoutRelationEqual
toItem: self.contentView
attribute: NSLayoutAttributeTop
multiplier: 0.0
constant: 100.0]];
[self.contentView addConstraint: [NSLayoutConstraint constraintWithItem: _toolbarView
attribute: NSLayoutAttributeBottom
relatedBy: NSLayoutRelationEqual
toItem: self.contentView
attribute: NSLayoutAttributeBottom
multiplier: 1.0
constant: 0]];
[super updateConstraints];
}
The layout works as intended, but I am getting the following error:
Unable to simultaneously satisfy constraints.
Probably at least one of the constraints in the following list is one you don't want. Try this: (1) look at each constraint and try to figure out which you don't expect; (2) find the code that added the unwanted constraint or constraints and fix it. (Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints)
(
"<NSLayoutConstraint:0x1f810f50 FOToolbarView:0x1f812900.top == + 70>",
"<NSLayoutConstraint:0x1f810dc0 FOToolbarView:0x1f812900.bottom == UITableViewCellContentView:0x1f8286d0.bottom>",
"<NSAutoresizingMaskLayoutConstraint:0x1f821230 h=--& v=--& V: [UITableViewCellContentView:0x1f8286d0(69)]>"
)
I've tried many things, without success. How can I get rid of this error?
