ios12 UIButton布局死循环问题

[libingting]

给button设置了约束满足MaxWidth与autoHeightRatio即在源码中 view.autoHeightRatioValue && view.width_sd > 0生效下执行 [self layoutAutoHeightWidthView:view model:model];

//在ios12中的layoutSubviews函数中执行“label.numberOfLines = 0”会造成死循环，ios11没有这个问题 label.numberOfLines = 0;

• (void)layoutAutoHeightWidthView:(UIView )view model:(SDAutoLayoutModel )model { if ([view.autoHeightRatioValue floatValue] > 0) { view.height_sd = view.width_sd [view.autoHeightRatioValue floatValue]; } else { if ([view isKindOfClass:[UILabel class]]) { UILabel label = (UILabel *)view;

//在ios12中的layoutSubviews函数中执行“label.numberOfLines = 0”会造成死循环，ios11没有这个问题

        label.numberOfLines = 0;

        if (label.text.length) {
            if (!label.isAttributedContent) {
                CGRect rect = [label.text boundingRectWithSize:CGSizeMake(label.width_sd, MAXFLOAT) options:NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading attributes:@{NSFontAttributeName : label.font} context:nil];
                label.height_sd = rect.size.height + 0.1;
            } else {
                [label sizeToFit];
                if (label.sd_maxWidth && label.width_sd > [label.sd_maxWidth floatValue]) {
                    label.width_sd = [label.sd_maxWidth floatValue];
                }
            }
        } else {
            label.height_sd = 0;
        }
    } else {
        view.height_sd = 0;
    }
}

}