boundingRectWithSize
获取高度不准的问题,多半是差那么一点点,用于布局时,最好将获取的height向上取整一下。即:
modelOne.descHeight = ceilf([modelOne.desc boundingRectWithSize:CGSizeMake(CellImageWidth, CGFLOAT_MAX) options:NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading attributes:@{NSFontAttributeName:[UIFont systemFontOfSize:14]} context:nil].size.height);
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