两个标签彼此相邻，截断一个

Question

I have two labels next to each other, but the right one truncates even when I set truncate rules on the left one.

My code:

// Club name
labelFirst = [[UILabel alloc] init];
labelFirst.adjustsFontSizeToFitWidth = NO;
[labelFirst setLineBreakMode:NSLineBreakByTruncatingTail];
[labelFirst setTranslatesAutoresizingMaskIntoConstraints:NO];
[self.contentView addSubview:labelFirst];

labelSecond = [[UILabel alloc] init];
[labelSecond setAdjustsFontSizeToFitWidth:NO];
[labelSecond setTranslatesAutoresizingMaskIntoConstraints:NO];
[labelSecond setText:NSLocalizedString(@"IsCancelled", nil)];
[self.contentView addSubview:labelSecond];

NSLayoutConstraint *constraint = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-73-[label]-[label2]-10-|" options:0 metrics:nil views:@{@"label": labelFirst, @"label2": labelSecond}]
[self.contentView addConstraints:constraint];

How should I do this?

Answer 1

This is where Content Compression Resistance Priority comes into play. Set these values higher and lower based on which one you want compressed first. Higher for the label that you want take priority in resisting compression. Lower for the label that you want compressed (truncated) first.

You can do it programmatically (default is 750):

[labelFirst setContentCompressionResistancePriority:749
                                            forAxis:UILayoutConstraintAxisHorizontal];

Or in interface builder under the size inspector tab:

Here is another answer going into more detail on how they work.

Answer 2

NSLineBreakByTruncatingTail-它是标签的默认LineBreakMode值，将其更改为labelSecond以具有区别