constraints.mm

- (id)initWithFrame:(CGRect)frame
{
    if (self = [super initWithFrame:frame]) {
        UILabel *titleLabel = [[UILabel alloc] initWithFrame:CGRectZero];
        [titleLabel setTranslatesAutoresizingMaskIntoConstraints:NO];
        [titleLabel setNumberOfLines:0];
        [titleLabel setLineBreakMode:NSLineBreakByWordWrapping];
        [self addSubview:titleLabel];
        
        UILabel *dateLabel = [[UILabel alloc] initWithFrame:CGRectZero];
        [dateLabel setTranslatesAutoresizingMaskIntoConstraints:NO];
        [dateLabel setNumberOfLines:0];
        [titleLabel setLineBreakMode:NSLineBreakByWordWrapping];
        [self addSubview:dateLabel];
        
        UILabel *summaryLabel = [[UILabel alloc] initWithFrame:CGRectZero];
        [summaryLabel setTranslatesAutoresizingMaskIntoConstraints:NO];
        [summaryLabel setNumberOfLines:0];
        [summaryLabel setLineBreakMode:NSLineBreakByTruncatingTail];
        [self addSubview:summaryLabel];
        
        NSDictionary *views = NSDictionaryOfVariableBindings(titleLabel, summaryLabel, dateLabel);
        [self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"|-[titleLabel]-|" options:0 metrics:nil views:views]];
        [self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"|-[dateLabel]-|" options:0 metrics:nil views:views]];
        [self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"|-[summaryLabel]-|" options:0 metrics:nil views:views]];
        [self addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-[titleLabel][dateLabel]-2-[summaryLabel]-|" options:0 metrics:nil views:views]];
        
        NSLayoutConstraint *summaryLabelBottomSpace = [NSLayoutConstraint constraintWithItem:summaryLabel attribute:NSLayoutAttributeBottom relatedBy:NSLayoutRelationLessThanOrEqual toItem:self attribute:NSLayoutAttributeBottom multiplier:1.0 constant:-8.0];
        [self addConstraint:summaryLabelBottomSpace];
    }
    
    return self;
}