如何調試「EXC_BAD_INSTRUCTION（code = EXC_I386_INVOP，subcode = 0x0）」Swift錯誤？

Question

我需要下面的代碼才能運行。

let illinois = College(name: "University od Illinois", location: "Urbana-Champaign", numberOfStudents: 35000, image: UIImage(named: "Default")!) 

let missouri = College(name: "University of Missouri", location: "Columbia", numberOfStudents: 34658, image: UIImage(named: "MissuouriImage")!) 

let iowa = College(name: "University of Iowa", location: "Iowa City", numberOfStudents: 31065, image: UIImage(named: "IowaImage")!) 

colleges = [illinois, missouri, iowa] 

在密蘇里它說EXC_BAD_INSTRUCTION（代碼= EXC_I386_INVOP，子碼=爲0x0），這裏是圖像：

http://i.stack.imgur.com/euCg8.png

Answer 1

此代碼導致您的崩潰：

UIImage(named: "MissuouriImage")! 

檢查圖像是否存在（應該可能稱爲「MissouriImage」），並考慮解包您的可選設備以確保其存在：

if let missouriImage = UIImage(named: "MissuouriImage") { 
    let missouri = College(name: "University of Missouri", location: "Columbia", numberOfStudents: 34658, image: missouriImage) 
}