// 計算字符串的寬度，高度
letstring:String?="swift中計算字符串的寬度和高度。swift中計算字符串的寬度和高度。swift中計算字符串的寬度和高度。"
letfont:UIFont!?=?UIFont(name:"EuphemiaUCAS",size:12.0)
let?attributes?=?[NSFontAttributeName:font]
let?option?=?NSStringDrawingOptions.UsesLineFragmentOrigin
letrect:CGRect?=?string.boundingRectWithSize(CGSizeMake(320.0,999.9),options:?option,attributes:?attributes,context:nil)
print("rect:\(rect)")
