在UITableView中,自动布局中带有填充的多行UILabel

Question

我在UITableView中有一个UILabel,它最多应该有2行,并且周围有一些填充(左右7个,顶部和底部2个).我正在使用自动布局,仅针对iOS6及更高版本.正在以编程方式创建和添加所有视图.

我已经将我的UILabel子类化了,这是init方法:

- (id)init
{
self = [super init];

self.translatesAutoresizingMaskIntoConstraints = NO;
self.numberOfLines = 2;
self.backgroundColor = UIColorFromARGB(0x99000000);
self.textColor = [UIColor whiteColor];
self.font = [UIFont boldSystemFontOfSize:14.0f];

return self;
}

如果我添加它,我得到正确的填充,但它只是一行:

- (void)drawTextInRect:(CGRect)rect {
UIEdgeInsets insets = {2, 7, 2, 7};
return [super drawTextInRect:UIEdgeInsetsInsetRect(rect, insets)];
}

我已经看过几次这个答案,但它对我不起作用(没有效果):

- (CGRect)textRectForBounds:(CGRect)bounds limitedToNumberOfLines:(NSInteger)numberOfLines
{
UIEdgeInsets insets = {2, 7, 2, 7};
    return [super textRectForBounds:UIEdgeInsetsInsetRect(bounds,insets) limitedToNumberOfLines:numberOfLines];
}

它是否在表视图中有所不同？任何帮助,将不胜感激.

Answer 1

正如你在上面的评论中所看到的,你并没有真正说出你没想到的是什么.我刚刚完成了这个,这适用于autolayout:

@implementation InsetLabel

- (void) setInsets:(UIEdgeInsets)insets
    {
    _insets = insets ;
    [self invalidateIntrinsicContentSize] ;
    }

- (void)drawTextInRect:(CGRect)rect
    {
    return [super drawTextInRect:UIEdgeInsetsInsetRect(rect, self.insets)];
    }

- (void)resizeHeightToFitText
    {
    CGRect frame = [self bounds];
    CGFloat textWidth = frame.size.width - (self.insets.left + self.insets.right);

    CGSize newSize = [self.text sizeWithFont:self.font constrainedToSize:CGSizeMake(textWidth, 1000000) lineBreakMode:self.lineBreakMode];
    frame.size.height = newSize.height + self.insets.top + self.insets.bottom;
    self.frame = frame;
    }

- (CGSize) intrinsicContentSize
    {
    CGSize superSize = [super intrinsicContentSize] ;
    superSize.height += self.insets.top + self.insets.bottom ;
    superSize.width += self.insets.left + self.insets.right ;
    return superSize ;
    }

@end