Swift - 计算文本高度
效果
源码
//
// String+StringHeight.swift
// StringHeight
//
// Created by YouXianMing on 16/8/30.
// Copyright © 2016年 YouXianMing. All rights reserved.
// import UIKit extension String { /**
Get the height with the string. - parameter attributes: The string attributes.
- parameter fixedWidth: The fixed width. - returns: The height.
*/
func heightWithStringAttributes(attributes : [String : AnyObject], fixedWidth : CGFloat) -> CGFloat { guard self.characters.count > && fixedWidth > else { return
} let size = CGSizeMake(fixedWidth, CGFloat.max)
let text = self as NSString
let rect = text.boundingRectWithSize(size, options:.UsesLineFragmentOrigin, attributes: attributes, context:nil) return rect.size.height
} /**
Get the height with font. - parameter font: The font.
- parameter fixedWidth: The fixed width. - returns: The height.
*/
func heightWithFont(font : UIFont = UIFont.systemFontOfSize(), fixedWidth : CGFloat) -> CGFloat { guard self.characters.count > && fixedWidth > else { return
} let size = CGSizeMake(fixedWidth, CGFloat.max)
let text = self as NSString
let rect = text.boundingRectWithSize(size, options:.UsesLineFragmentOrigin, attributes: [NSFontAttributeName : font], context:nil) return rect.size.height
} /**
Get the width with the string. - parameter attributes: The string attributes. - returns: The width.
*/
func widthWithStringAttributes(attributes : [String : AnyObject]) -> CGFloat { guard self.characters.count > else { return
} let size = CGSizeMake(CGFloat.max, )
let text = self as NSString
let rect = text.boundingRectWithSize(size, options:.UsesLineFragmentOrigin, attributes: attributes, context:nil) return rect.size.width
} /**
Get the width with the string. - parameter font: The font. - returns: The string's width.
*/
func widthWithFont(font : UIFont = UIFont.systemFontOfSize()) -> CGFloat { guard self.characters.count > else { return
} let size = CGSizeMake(CGFloat.max, )
let text = self as NSString
let rect = text.boundingRectWithSize(size, options:.UsesLineFragmentOrigin, attributes: [NSFontAttributeName : font], context:nil) return rect.size.width
}
}