uilable自动换行

CGSize titleBrandSizeForHeight = [titleBrand.text sizeWithFont:titleBrand.font];
CGSize titleBrandSizeForLines = [titleBrand.text sizeWithFont:titleBrand.font constrainedToSize:CGSizeMake(infoWidth, MAXFLOAT) lineBreakMode:UILineBreakModeWordWrap];
titleBrand.numberOfLines = ceil(titleBrandSizeForLines.height/titleBrandSizeForHeight.height);
if (titleBrand.numberOfLines <= 1) {
titleBrand.frame = CGRectMake(5, titleBrand.frame.size.height , infoWidth, titleBrandSizeForHeight.height);
}else {
titleBrand.frame = CGRectMake(5, titleBrand.frame.size.height , infoWidth, titleBrand.numberOfLines*titleBrandSizeForHeight.height);
}