UITableViewAutomaticDimension 不适用于调整单元格高度 [英] UITableViewAutomaticDimension Not Working for Resizing Cell Height
问题描述
只要我不尝试启用自动调整大小,我的单元格就可以正常显示.当我在 viewController 中添加用于自动调整大小的两行时,个人资料图片、用户名和日期下的所有内容都会消失(当您单击图片时,该单元格应该看起来像 Instagram 那样).
My cell displays fine as long as I don't try to enable the automatic resizing. When I add the two lines for auto-resizing in my viewController, everything under the profile picture, username, and date disappears (the cell is supposed to look like Instagram does when you click on a picture).
如果我注释掉 tableView.rowHeight = UITableViewAutomaticDimensiontableView.estimatedRowHeight = 450
然后单元格的显示完全符合预期,但显然不会调整大小.
If I comment out tableView.rowHeight = UITableViewAutomaticDimension
tableView.estimatedRowHeight = 450
then the cell displays exactly like it is supposed to, but it obviously doesn't resize.
这是我目前拥有的代码:在我的 tableViewController 中:
This is the code I have currently: In my tableViewController:
tableView.rowHeight = UITableViewAutomaticDimension
tableView.estimatedRowHeight = 450
在我的 cellViewController
In my cellViewController
@IBOutlet weak var profilePic: UIImageView!
@IBOutlet weak var usernameBtn: UIButton!
@IBOutlet weak var dateLbl: UILabel!
@IBOutlet weak var mainPic: UIImageView!
@IBOutlet weak var likeBtn: UIButton!
@IBOutlet weak var commentBtn: UIButton!
@IBOutlet weak var moreBtn: UIButton!
@IBOutlet weak var likeLbl: UILabel!
@IBOutlet weak var titleLbl: UILabel!
@IBOutlet weak var uuidLbl: UILabel!
override func awakeFromNib() {
super.awakeFromNib()
let width = UIScreen.main.bounds.width
//allow constraints
profilePic.translatesAutoresizingMaskIntoConstraints = false
usernameBtn.translatesAutoresizingMaskIntoConstraints = false
dateLbl.translatesAutoresizingMaskIntoConstraints = false
mainPic.translatesAutoresizingMaskIntoConstraints = false
likeBtn.translatesAutoresizingMaskIntoConstraints = false
commentBtn.translatesAutoresizingMaskIntoConstraints = false
moreBtn.translatesAutoresizingMaskIntoConstraints = false
likeLbl.translatesAutoresizingMaskIntoConstraints = false
titleLbl.translatesAutoresizingMaskIntoConstraints = false
uuidLbl.translatesAutoresizingMaskIntoConstraints = false
let pictureWidth = width - 20
//constraints
//vertical constraints: objects that are directly above or below each other are in same constraint, if not vertical it must go in another constraint
contentView.addConstraints(NSLayoutConstraint.constraints(
//V: = vertical constraint ; | = top border ; -5-[profilePic(30)] make profilePic with height of 30 and place 5 points below top border ; -10-[mainPic(\(pictureWidth))] make pic with height of pictureWidth and place 10 points below profilePic ; -5-[like(30)] make like button height 30 points and put 5 points below mainPic
withVisualFormat: "V:|-10-[profilePic(30)]-10-[mainPic(\(pictureWidth))]-5-[like(30)]-5-[title]",
options: [], metrics: nil, views: ["profilePic":profilePic, "mainPic":mainPic, "like":likeBtn, "title":titleLbl]))
contentView.addConstraints(NSLayoutConstraint.constraints(
//place username 5 points below top border
withVisualFormat: "V:|-10-[username]",
options: [], metrics: nil, views: ["username": usernameBtn]))
contentView.addConstraints(NSLayoutConstraint.constraints(
//place comment button 10 points below mainPic
withVisualFormat: "V:[mainPic]-5-[comment]",
options: [], metrics: nil, views: ["mainPic":mainPic, "comment":commentBtn]))
contentView.addConstraints(NSLayoutConstraint.constraints(
withVisualFormat: "V:|-10-[date]",
options: [], metrics: nil, views: ["date":dateLbl]))
contentView.addConstraints(NSLayoutConstraint.constraints(
withVisualFormat: "V:[mainPic]-10-[likes]",
options: [], metrics: nil, views: ["mainPic":mainPic, "likes":likeLbl]))
contentView.addConstraints(NSLayoutConstraint.constraints(
withVisualFormat: "V:[mainPic]-5-[more]",
options: [], metrics: nil, views: ["mainPic":mainPic, "more":moreBtn]))
contentView.addConstraints(NSLayoutConstraint.constraints(
withVisualFormat: "H:|-10-[profilePic(30)]-10-[username]-10-|",
options: [], metrics: nil, views: ["profilePic":profilePic, "username":usernameBtn]))
contentView.addConstraints(NSLayoutConstraint.constraints(
withVisualFormat: "H:|-10-[mainPic]-10-|",
options: [], metrics: nil, views: ["mainPic":mainPic]))
contentView.addConstraints(NSLayoutConstraint.constraints(
withVisualFormat: "H:|-15-[like(30)]-10-[likes]-30-[comment]",
options: [], metrics: nil, views: ["like":likeBtn, "likes":likeLbl, "comment":commentBtn]))
contentView.addConstraints(NSLayoutConstraint.constraints(
withVisualFormat: "H:[more]-15-|",
options: [], metrics: nil, views: ["more":moreBtn]))
contentView.addConstraints(NSLayoutConstraint.constraints(
withVisualFormat: "H:|-15-[title]-15-|",
options: [], metrics: nil, views: ["title":titleLbl]))
contentView.addConstraints(NSLayoutConstraint.constraints(
withVisualFormat: "H:[date]-10-|",
options: [], metrics: nil, views: ["date":dateLbl]))
}}
推荐答案
试试这个代码:
注意:这两种方法都应该有效.在 Swift 3 中测试过.
Note: Both method should work.Tested in Swift 3.
方法一:
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
tableView.estimatedRowHeight = 44.0 // standard tableViewCell height
tableView.rowHeight = UITableViewAutomaticDimension
return yourArrayName.count
}
方法二:
override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
tableView.estimatedRowHeight = 44.0 // standard tableViewCell height
tableView.rowHeight = UITableViewAutomaticDimension
return UITableViewAutomaticDimension
}
override func tableView(_ tableView: UITableView, estimatedHeightForRowAt indexPath: IndexPath) -> CGFloat {
return UITableViewAutomaticDimension
}
注意:您可能需要将此代码放入您的 cellForRowAt
Note: You may need to put this code inside your cellForRowAt
yourCellName.sizeToFit()
cell.textLabel?.numberOfLines = 0
输出:
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