我正在尝试创建一个自定义的UITableViewCell,并且存在具有适当高度的单元格框架问题。这很麻烦,因为iPhone 4s/5s运行iOS 8.4的单元尺寸正确,但运行相同操作系统的iPhone 6/6 +的单元尺寸却不正确。UITableViewCell高度不正确,sizeToFit尺寸不正确
混沌发生在messageLabel
上,呼叫sizeToFit
。有些标签几乎看起来在下面有额外的空白行,但显然没有单元格所显示的那么高。
下面是自定义单元格。看起来会引起麻烦的标签是messageLabel。要查看帧的标签,let borders = true
//
// NotesTableViewCell.swift
// urchin
//
// Created by Ethan Look on 6/17/15.
// Copyright (c) 2015 Tidepool. All rights reserved.
//
import Foundation
import UIKit
let noteCellHeight: CGFloat = 128
let noteCellInset: CGFloat = 16
let labelSpacing: CGFloat = 6
class NoteCell: UITableViewCell {
let borders = false
var cellHeight: CGFloat = CGFloat()
let usernameLabel: UILabel = UILabel()
let timedateLabel: UILabel = UILabel()
var messageLabel: UILabel = UILabel()
func configureWithNote(note: Note) {
usernameLabel.text = note.user!.fullName
usernameLabel.font = UIFont(name: "OpenSans-Bold", size: 17.5)!
usernameLabel.textColor = UIColor.blackColor()
usernameLabel.sizeToFit()
let usernameX = noteCellInset
let usernameY = noteCellInset
usernameLabel.frame.origin = CGPoint(x: usernameX, y: usernameY)
let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "EEEE M.d.yy h:mm a"
var dateString = dateFormatter.stringFromDate(note.timestamp)
dateString = dateString.stringByReplacingOccurrencesOfString("PM", withString: "pm", options: NSStringCompareOptions.LiteralSearch, range: nil)
dateString = dateString.stringByReplacingOccurrencesOfString("AM", withString: "am", options: NSStringCompareOptions.LiteralSearch, range: nil)
timedateLabel.text = dateString
timedateLabel.font = UIFont(name: "OpenSans", size: 12.5)!
timedateLabel.textColor = UIColor.blackColor()
timedateLabel.sizeToFit()
let timedateX = contentView.frame.width - (noteCellInset + timedateLabel.frame.width)
let timedateY = usernameLabel.frame.midY - timedateLabel.frame.height/2
timedateLabel.frame.origin = CGPoint(x: timedateX, y: timedateY)
messageLabel.frame.size = CGSize(width: contentView.frame.width - 2 * noteCellInset, height: CGFloat.max)
let hashtagBolder = HashtagBolder()
let attributedText = hashtagBolder.boldHashtags(note.messagetext)
messageLabel.attributedText = attributedText
messageLabel.adjustsFontSizeToFitWidth = false
messageLabel.lineBreakMode = NSLineBreakMode.ByWordWrapping
messageLabel.numberOfLines = 0
messageLabel.sizeToFit()
let messageX = noteCellInset
let messageY = usernameLabel.frame.maxY + 2 * labelSpacing
messageLabel.frame.origin = CGPoint(x: messageX, y: messageY)
contentView.addSubview(usernameLabel)
contentView.addSubview(timedateLabel)
contentView.addSubview(messageLabel)
cellHeight = noteCellInset + usernameLabel.frame.height + 2 * labelSpacing + messageLabel.frame.height + noteCellInset
if (borders) {
usernameLabel.layer.borderWidth = 1
usernameLabel.layer.borderColor = UIColor.redColor().CGColor
timedateLabel.layer.borderWidth = 1
timedateLabel.layer.borderColor = UIColor.redColor().CGColor
messageLabel.layer.borderWidth = 1
messageLabel.layer.borderColor = UIColor.redColor().CGColor
self.contentView.layer.borderWidth = 1
self.contentView.layer.borderColor = UIColor.blueColor().CGColor
}
self.contentView.frame.size = CGSize(width: self.contentView.frame.width, height: cellHeight)
}
}
而且heightForRowAtIndexPath
:
func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
let cell = NoteCell(style: .Default, reuseIdentifier: nil)
cell.configureWithNote(notes[indexPath.row])
return cell.cellHeight
}
该项目是开源的,on Github,可以随意克隆库,并检查了所有的代码自己。
谢谢!