//MARK: - 动态 计算行高,根据字符串的实际内容的多少 在固定的宽度和字体的大小,动态的计算出实际的高度
func textHeightFromTextString(text: String, textWidth: CGFloat, fontSize: CGFloat, isBold: Bool) -> CGFloat
{
if (getCurrentIOS() >= 7.0)
{
//iOS7之后
var dict: NSDictionary = NSDictionary()
if (isBold) {
dict = NSDictionary(object: UIFont.boldSystemFontOfSize(fontSize), forKey: NSFontAttributeName)
} else {
dict = NSDictionary(object: UIFont.systemFontOfSize(fontSize), forKey: NSFontAttributeName)
}
let rect: CGRect = (text as NSString).boundingRectWithSize(CGSizeMake(textWidth, CGFloat(MAXFLOAT)), options: [NSStringDrawingOptions.TruncatesLastVisibleLine, NSStringDrawingOptions.UsesFontLeading, NSStringDrawingOptions.UsesLineFragmentOrigin], attributes: dict as? [String : AnyObject], context: nil)
return rect.size.height
} else
{
//iOS7之前
return 0.0
}
}
//MARK: - 获取版本号
func getCurrentIOS() -> Double
{
return (UIDevice.currentDevice().systemVersion as NSString).doubleValue
}
//改变对应frame
var frame = self.titleLab!.frame
frame.size.height = textHeightFromTextString(model.title!, textWidth: self.titleLab!.frame.size.width, fontSize: 19, isBold: true)
self.titleLab!.frame = frame