UILable 自适应长度

//Calculate the size necessary for the UILableNSString *theText = @"Texting";CGSize theStringSize = [theText sizeWithFont:font     constrainedToSize:theLabel.frame.size    lineBreakMode:theLabel.lineBreakMode];//Adjust the size of the UILabletheLable.frame = CGRectMake(theLable.frame.origin.x,     theLable.frame.origin.y,     theStringSize.width, theStringSize.height);theLable.text = theText;