[英]Background image not loading onto button ios 8 swift
嗨,我在使用UIImage(named: String)
將資產目錄中的圖像加載到按鈕的背景時遇到問題,該按鈕僅顯示為完全白色,並且圖像對象等於nil
這是我到目前為止的代碼
//
// TopButtonContainer.swift
// Risky-Buisiness-Museum-App-iOS
//
// Created by THOMAS NEEDHAM on 11/07/2015.
// Copyright (c) 2015 THOMAS NEEDHAM. All rights reserved.
//
import Foundation
import UIKit
public class TopButtonContainer : UIViewController {
var TopButtons: [UIButton] = [UIButton]();
let TopButtonImageNamesBlue = [ "Aquarium Icon Blue", "Bugs Icon Blue", "Ancient World Icon Blue", "World Cultures Icon Blue", "Dinosaurs Icon Blue", "Space Icon Blue"]
let TopButtonImageNamesGreen = [ "Aquarium Icon Green", "Bugs Icon Green", "Ancient World Icon Green", "World Cultures Icon Green", "Dinosaurs Icon Green", "Space Icon Green"]
var parent: HomeViewController?
let NUM_BUTTONS:CGFloat = 6
required public init(coder aDecoder: NSCoder) {
parent = HomeViewController(coder: aDecoder)
super.init(coder: aDecoder);
}
override public func viewDidLoad() {
super.viewDidLoad()
parent = getParent() as? HomeViewController;
for var i:CGFloat = 0; i < NUM_BUTTONS; i++
{
self.view.addSubview(CreateButton(i))
}
//Cont.addSubview(CreateButton(CGFloat(1)))
NSLog("Top buttons Loaded")
}
override public func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
private func CreateButton(index:CGFloat) -> UIButton{
let Viewwidth: CGFloat = self.view.bounds.width
let Viewheight: CGFloat = self.view.bounds.height
var i:Int = Int(index)
var value:String = TopButtonImageNamesBlue[i]
var button = UIButton(frame: CGRect(x: Viewwidth / NUM_BUTTONS * index, y:CGFloat(0.0), width: Viewwidth / NUM_BUTTONS, height: Viewheight))
var image:UIImage? = (UIImage(named: TopButtonImageNamesBlue[i])) // loading image here
if(image == nil){
NSLog("NIL")
}
button.setImage(image, forState: UIControlState.Normal)
button.addTarget(self, action:"ButtonClicked:", forControlEvents: UIControlEvents.TouchDown)
TopButtons.append(button);
return button
}
func ButtonClicked(sender: UIButton){
for var i:Int = 0; i < TopButtons.count; i++
{
if(TopButtons[i] == sender){
NSLog("Button %i Was Pressed", i)
}
}
}
public func getParent() -> UIViewController?{
return self.presentingViewController as? HomeViewController
}
internal func LoadMapButtons(){
for var i = 0; i < self.TopButtons.count; i+=1 {
sleep(1000)
}
// todo load map buttons
}
public func resetButtons(index:Int){
for var i = 0; i < TopButtons.count; i+=1{
if(i == index){
continue
}
else{
// todo reset button images
}
}
}
}
我已經在這個問題上停留了幾天,並嘗試了關於stackoverflow的其他建議,但是都沒有解決問題
提前致謝
編輯images.xcassets的屏幕截圖
只需從圖像字符串中刪除.png
let TopButtonImageNamesBlue = [ "Aquarium Icon Blue", "Bugs Icon Blue", "Ancient World Icon Blue", "World Cultures Icon Blue", "Dinosaurs Icon Blue", "Space Icon Blue"]
這是我的工作代碼:
var images = ["01","02","03"]
var image : UIImage? = UIImage(named: images[0])
if (image == nil) {
println("null")
}
else{
var button: UIButton = UIButton.buttonWithType(UIButtonType.Custom) as! UIButton
button.frame = CGRectMake(0, 0, 50, 50)
button.setImage(image, forState: .Normal)
self.view.addSubview(button)
println("image is available")
}
輸出為:
圖片可用
您必須提供與資產文件夾相同的名稱。
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