模仿微博页面，swift版本
如题，对文博页面的简单的模仿，和之前团购那个不一样的是，这个是用代码去添加cell的子控件，还需要计算文本内容所占的大小，还有就是注意到了代理方法的执行是有一定顺序的，以后需要注意
代码部分:
首先是数据的加载，这次的数据的加载和之前的有点不同，除了加载数据之外,还需要计算出控件需要的大小,分成了两个类
//
// Microblog.swift
// 微博
//
// Created by admin on 16/1/6.
// Copyright © 2016年 jin. All rights reserved.
//
import UIKit
//记录下两个lable的字体的大小，方便之后计算
let nameFontSize:CGFloat = 15
let textFontSize:CGFloat = 17
//模型类
class Microblog: NSObject {
var name:NSString!
var icon:NSString!
var text:NSString!
var picture:NSString!
var vip:NSNumber!
//便捷构造器
convenience init(dic:[String : AnyObject]) {
self.init()
self.setValuesForKeysWithDictionary(dic)
}
}
//
// MicroblogFram.swift
// 微博
//
// Created by admin on 16/1/7.
// Copyright © 2016年 jin. All rights reserved.
//
import UIKit
//控件位置信息类
class MicroblogFram: NSObject {
let iconFram:CGRect
let nameFram:CGRect
let vipFram:CGRect
let textFram:CGRect
let pictureFram:CGRect
let cellHeight:CGFloat
let microblog:Microblog
//构造方法
init(iconFram:CGRect,nameFram:CGRect,vipFram:CGRect,textFram:CGRect,pictureFram:CGRect,cellHeight:CGFloat,microblog:Microblog) {
self.iconFram = iconFram
self.nameFram = nameFram
self.vipFram = vipFram
self.textFram = textFram
self.pictureFram = pictureFram
self.cellHeight = cellHeight
self.microblog = microblog
}
//便捷构造器，使用microblog对象来初始化microblogfram
convenience init(microblog:Microblog) {
//间距
let margin:CGFloat = 10
//图标fram计算
let iconFram:CGRect = CGRectMake(10, 10, 50, 50)
//通过字符串计算字符所需的大小
let nameSize = microblog.name.boundingRectWithSize(CGSizeMake(CGFloat.max, CGFloat.max), options: NSStringDrawingOptions.UsesFontLeading, attributes: [NSFontAttributeName: UIFont.systemFontOfSize(nameFontSize)], context: nil).size
let nameX = CGRectGetMaxX(iconFram) + margin
let nameY = ((iconFram.size.height - nameSize.height) / 2) + margin
let nameFram = CGRectMake(nameX, nameY, nameSize.width, nameSize.height)
//vip
var vipFram = CGRectMake(0, 0, 0, 0)
if microblog.vip == 1
{
let vipSize = CGSizeMake(14, 14)
let vipX = CGRectGetMaxX(nameFram) + margin
let vipY = (nameFram.size.height - vipSize.height) / 2 + nameFram.origin.y
vipFram = CGRectMake(vipX, vipY, vipSize.width, vipSize.height)
}
//text
//通过字符串计算字符所需要占用的大小，注意 NSStringDrawingOptions.UsesLineFragmentOrigin 这个选项会把文字换行的高度计算起来，UsesFontLeading只计算一行的高度
let textSize = microblog.text.boundingRectWithSize(CGSizeMake(UIScreen.mainScreen().bounds.size.width - (margin * 2), CGFloat.max), options: NSStringDrawingOptions.UsesLineFragmentOrigin, attributes: [NSFontAttributeName: UIFont.systemFontOfSize(textFontSize)], context: nil).size
let textX = margin
let textY = CGRectGetMaxY(iconFram) + margin
let textFram = CGRectMake(textX, textY, textSize.width, textSize.height)
//整个cell的高度
var cellHeight = CGRectGetMaxY(textFram) + margin
//picture
var pictureFram = CGRectMake(0, 0, 0, 0)
if microblog.picture != nil
{
let pictureSize = CGSizeMake(100, 100)
let pictureX = margin
let pictureY = CGRectGetMaxY(textFram) + margin
pictureFram = CGRectMake(pictureX, pictureY, pictureSize.width, pictureSize.height)
//如果有图片，修改cell高度
cellHeight = CGRectGetMaxY(pictureFram) + margin
}
//初始化类
self.init(iconFram: iconFram,nameFram: nameFram,vipFram: vipFram,textFram: textFram,pictureFram: pictureFram,cellHeight: cellHeight,microblog:microblog)
}
//读取plist中的数据
class func instanceWithFile()->[MicroblogFram]
{
let path:String! = NSBundle.mainBundle().pathForResource("microblog", ofType: "plist")
let data = NSArray(contentsOfFile: path)
var microblogs:[MicroblogFram] = []
for var i = 0;i < data?.count;i++
{
microblogs.append(MicroblogFram.init(microblog: Microblog.init(dic: data![i] as! [String : AnyObject])))
}
return microblogs
}
}
自定义cell类,没有用到xib，注意下变量的 didSet 方法
//
// MicroblogCell.swift
// 微博
//
// Created by admin on 16/1/6.
// Copyright © 2016年 jin. All rights reserved.
//
import UIKit
//自定义cell
class MicroblogCell: UITableViewCell {
var microblogFram:MicroblogFram?
{
//当变量发生改变时会触发这个方法
didSet
{
//添加子控件
self.assignSubviewContent()
//调整子控件位置
self.assignSubViewFram()
}
}
//存储子控件的变量
var nameView:UILabel!
var iconView:UIImageView!
var textView:UILabel!
var pictureView:UIImageView!
var vipView:UIImageView!
//快速初始化
class func instance(tableView:UITableView)->MicroblogCell
{
//尝试从缓冲池中读取内容
var cell = tableView.dequeueReusableCellWithIdentifier("cell")
if cell == nil
{
cell = MicroblogCell(style: UITableViewCellStyle.Default, reuseIdentifier: "cell")
}
let temp = cell as! MicroblogCell
return temp
}
//重写父类的构造方法
override init(style: UITableViewCellStyle, reuseIdentifier: String?)
{
//执行父类的构造器
super.init(style: style, reuseIdentifier: reuseIdentifier)
//执行自己的方法，就是添加子控件
self.nameView = UILabel()
self.nameView.font = UIFont.systemFontOfSize(nameFontSize)
self.iconView = UIImageView()
self.textView = UILabel()
self.textView.font = UIFont.systemFontOfSize(textFontSize)
//文本内容可能需要换行，这里设置下行数
self.textView.numberOfLines = 0
self.pictureView = UIImageView()
self.vipView = UIImageView()
//添加进父控件
self.addSubview(self.nameView)
self.addSubview(self.iconView)
self.addSubview(self.textView)
self.addSubview(self.pictureView)
self.addSubview(self.vipView)
}
//这个方法不知道什么用，重写上面构造方法的时候系统自动加上来的
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
//给子控件赋值
func assignSubviewContent()
{
self.nameView.text = self.microblogFram?.microblog.name as? String
self.iconView.image = UIImage(imageLiteral: self.microblogFram?.microblog.icon as! String)
self.textView.text = self.microblogFram?.microblog.text as? String
if self.microblogFram?.microblog.picture != nil
{
self.pictureView.image = UIImage(imageLiteral: self.microblogFram?.microblog.picture as! String)
}
if self.microblogFram?.microblog.vip == 1
{
self.vipView.image = UIImage(imageLiteral: "vip")
self.vipView.hidden = false
self.nameView.textColor = UIColor.redColor()
}
else
{
self.vipView.hidden = true
self.nameView.textColor = UIColor.blackColor()
}
}
//设置子控件位置大小
func assignSubViewFram()
{
self.nameView.frame = (self.microblogFram?.nameFram)!
self.iconView.frame = (self.microblogFram?.iconFram)!
self.textView.frame = (self.microblogFram?.textFram)!
self.pictureView.frame = (self.microblogFram?.pictureFram)!
self.vipView.frame = (self.microblogFram?.vipFram)!
}
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
}
override func setSelected(selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
// Configure the view for the selected state
}
}
然后就是在控制器中的调用了
//
// TableViewController.swift
// 微博
//
// Created by admin on 16/1/6.
// Copyright © 2016年 jin. All rights reserved.
//
import UIKit
class TableViewController: UITableViewController {
lazy var microblogs:[MicroblogFram] = MicroblogFram.instanceWithFile()
override func viewDidLoad() {
super.viewDidLoad()
// Uncomment the following line to preserve selection between presentations
// self.clearsSelectionOnViewWillAppear = false
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// MARK: - Table view data source
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
// #warning Incomplete implementation, return the number of sections
return 1
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// #warning Incomplete implementation, return the number of rows
return self.microblogs.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = MicroblogCell.instance(tableView)
cell.microblogFram = self.microblogs[indexPath.row]
// Configure the cell...
return cell
}
override func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
return self.microblogs[indexPath.row].cellHeight
}
}