比較本地圖片迅速

Question

「可選的布爾類型，不能用作布爾;！測試零，而不是」

是我得到

我試圖做一個「老虎機」的錯誤應用程序，非常基本， 你按UIButton，三個圖像應該都隨機更改，如果3個匹配，打印「你贏了！」

import UIKit 

class ViewController: UIViewController { 

@IBOutlet weak var img1: UIImageView! 
@IBOutlet weak var img2: UIImageView! 
@IBOutlet weak var img3: UIImageView! 
@IBOutlet weak var rollBtn: UIButton! 

override func viewDidLoad() { 
    super.viewDidLoad() 
    // Do any additional setup after loading the view, typically from a nib. 
} 

override func didReceiveMemoryWarning() { 
    super.didReceiveMemoryWarning() 
    // Dispose of any resources that can be recreated. 
} 


@IBAction func onRollPress(sender: AnyObject) { 
    let randomRoll = ImgArray().getRandomImage() 
    img1.image = randomRoll 
    img2.image = randomRoll 
    img3.image = randomRoll 

    if (img1.image! == img2 && img3) { 
     print("You won!") 
    } 

} 

} 

Answer 1

如果你的圖像是在一個數組中，爲什麼不獲取圖像的索引並進行比較。或者你可以將圖像轉換爲base64字符串並進行比較。

編輯：不知道很多關於你的ImgArray類，這可能會爲你工作：

@IBAction func onRollPress(sender: AnyObject) { 
let randomRoll1 = ImgArray().getRandomImage() 
let randomRoll2 = ImgArray().getRandomImage() 
let randomRoll3 = ImgArray().getRandomImage() 

img1.image = randomRoll1 
img2.image = randomRoll2 
img3.image = randomRoll3 

let imgIndex1 = ImgArray().indexOf(randomRoll1) 
let imgIndex2 = ImgArray().indexOf(randomRoll2) 
let imgIndex3 = ImgArray().indexOf(randomRoll3) 

if (imgIndex1 == imgIndex2 && imgIndex3) { 
    print("You won!") 
} 
}