如何在 Xcode 中为我的 tableview 添加上边距？
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How can I add a top margin to my tableview in Xcode?
提问by Larry Navarro
I'm trying to add an image on the very top of the first cell of a table view. How can i make the table view have a top margin? Right now, the image is just overlapping the tableview. I am trying to just get the table view to come down a little bit. I do not want to make it smaller or something like that. I just want to add a button to the top of the tableview.
我正在尝试在表格视图的第一个单元格的最顶部添加一个图像。如何使表格视图具有上边距？现在，图像只是与 tableview 重叠。我试图让表格视图稍微下降一点。我不想让它变小或类似的东西。我只想在 tableview 的顶部添加一个按钮。
//
// usersVC.swift
// CaastRun
//
// Created by Computer on 5/23/15.
// Copyright (c) 2015 Caast. All rights reserved.
//
import UIKit
class usersVC: UIViewController, UITableViewDataSource, UITableViewDelegate {
@IBOutlet weak var resultsTable: UITableView!
var resultsNameArray = [String]()
var resultsUserNameArray = [String]()
var resultsImageFiles = [PFFile]()
override func viewDidLoad() {
super.viewDidLoad()
let theWidth = view.frame.size.width
let theHeight = view.frame.size.height
resultsTable.frame = CGRectMake(0, 0, theWidth, theHeight)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
override func viewDidAppear(animated: Bool) {
resultsNameArray.removeAll(keepCapacity: false)
resultsUserNameArray.removeAll(keepCapacity: false)
resultsImageFiles.removeAll(keepCapacity: false)
var query = PFUser.query()
query!.whereKey("username", notEqualTo: PFUser.currentUser()!.username!)
query!.findObjectsInBackgroundWithBlock {
(objects:[AnyObject]?, error:NSError?) -> Void in
if error == nil {
for object in objects! {
self.resultsNameArray.append(object.objectForKey("profileName") as! String)
self.resultsImageFiles.append(object.objectForKey("photo") as! PFFile)
self.resultsUserNameArray.append(object.objectForKey("username") as! String)
self.resultsTable.reloadData()
}
}
}
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return resultsNameArray.count
}
func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
return 64
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
var cell:usersCell = tableView.dequeueReusableCellWithIdentifier("Cell") as! usersCell
cell.profileLbl.text = self.resultsNameArray[indexPath.row]
cell.usernameLbl.text = self.resultsUserNameArray[indexPath.row]
var query = PFQuery(className: "follow")
query.whereKey("user", equalTo: PFUser.currentUser()!.username!)
query.whereKey("userToFollow", equalTo: cell.usernameLbl.text!)
query.countObjectsInBackgroundWithBlock {
(count:Int32, error:NSError?) -> Void in
if error == nil {
if count == 0 {
cell.followBtn.setTitle("Follow", forState: UIControlState.Normal)
} else {
cell.followBtn.setTitle("Following", forState: UIControlState.Normal)
}
}
}
self.resultsImageFiles[indexPath.row].getDataInBackgroundWithBlock {
(imageData:NSData?, error:NSError?) -> Void in
if error == nil {
let image = UIImage(data: imageData!)
cell.imgView.image = image
}
}
return cell
}
@IBOutlet weak var searchText: UITextField!
@IBAction func searchButton(sender: AnyObject) {
resultsNameArray.removeAll(keepCapacity: false)
resultsUserNameArray.removeAll(keepCapacity: false)
resultsImageFiles.removeAll(keepCapacity: false)
var query = PFUser.query()
query!.whereKey("username", notEqualTo: PFUser.currentUser()!.username!)
query!.whereKey("profileName", containsString: self.searchText.text)
query!.findObjectsInBackgroundWithBlock {
(objects:[AnyObject]?, error:NSError?) -> Void in
if error == nil {
for object in objects! {
self.resultsNameArray.append(object.objectForKey("profileName") as! String)
self.resultsImageFiles.append(object.objectForKey("photo") as! PFFile)
self.resultsUserNameArray.append(object.objectForKey("username") as! String)
self.resultsTable.reloadData()
}
}
}
}
}
回答by Icaro
I am not sure if I understand your question, if you are trying to have a margin between your table and the view try this:
我不确定我是否理解你的问题，如果你想在你的桌子和视图之间留出一个边距，试试这个：
Swift 3
斯威夫特 3
self.tableView.contentInset = UIEdgeInsets(top: 20,left: 0,bottom: 0,right: 0)
Swift 2
斯威夫特 2
self.tableView.contentInset = UIEdgeInsetsMake(20, 0, 0, 0);
