Ios 启动时显示空白白屏，但预览时显示良好
我的档案就是这样 主故事板Ios 启动时显示空白白屏，但预览时显示良好,ios,swift,Ios,Swift,我的档案就是这样 主故事板 import UIKit class ViewController: UIViewController { @IBOutlet weak var pctA: UITextField! @IBOutlet weak var pctF: UITextField! @IBOutlet weak var pctM: UITextField! @IBOutlet weak var maxA: UITextField! @IBOutl
import UIKit
class ViewController: UIViewController {
@IBOutlet weak var pctA: UITextField!
@IBOutlet weak var pctF: UITextField!
@IBOutlet weak var pctM: UITextField!
@IBOutlet weak var maxA: UITextField!
@IBOutlet weak var maxM: UITextField!
@IBOutlet weak var maxF: UITextField!
@IBOutlet weak var ptsF: UITextField!
@IBOutlet weak var ptsM: UITextField!
@IBOutlet weak var ptsA: UITextField!
@IBOutlet weak var creditNum: UITextField!
@IBOutlet weak var courseTitle: UITextField!
@IBOutlet weak var bbTFone: UITextField!
@IBOutlet weak var bbTFtwo: UITextField!
@IBOutlet weak var bbTFthree: UITextField!
@IBOutlet weak var bbTFfour: UITextField!
@IBOutlet weak var bbImgOne: UIImageView!
@IBOutlet weak var bbImgTwo: UIImageView!
@IBOutlet weak var bbImgThree: UIImageView!
@IBOutlet weak var bbImageFour: UIImageView!
class course {
var percentA:Int
var percentF:Int
var percentM:Int
var maxAssignment:Int
var maxFinal:Int
var maxMidterm:Int
var pointsA:Int
var pointsF:Int
var pointsM:Int
var numofCredits:Int
var courseName:String
init (courseName: String, numofCredits: Int, pointsM: Int, pointsF: Int, pointsA: Int, maxMidterm: Int, maxFinal: Int, maxAssignment: Int, percentA: Int, percentF: Int, percentM: Int) {
self.courseName = courseName
self.numofCredits = numofCredits
self.pointsM = pointsM
self.pointsF = pointsF
self.pointsA = pointsA
self.maxMidterm = maxMidterm
self.maxFinal = maxFinal
self.maxAssignment = maxAssignment
self.percentA = percentA
self.percentF = percentF
self.percentM = percentM
}
}
@IBAction func addCourse(sender: AnyObject) {
let newCourse = course(courseName: courseTitle.text!, numofCredits: Int(creditNum.text!)!, pointsM: Int(creditNum.text!)!, pointsF: Int(creditNum.text!)!, pointsA: Int(creditNum.text!)!, maxMidterm: Int(creditNum.text!)!, maxFinal: Int(creditNum.text!)!, maxAssignment: Int(creditNum.text!)!, percentA: Int(creditNum.text!)!, percentF: Int(creditNum.text!)!, percentM: Int(creditNum.text!)! )
var courseArray = [newCourse]
var assignmentPts = ((newCourse.pointsA)/(newCourse.maxAssignment) * newCourse.percentA)
var midtermPts = ((newCourse.pointsA)/(newCourse.maxAssignment) * newCourse.percentA)
var finalPts = ((newCourse.pointsA)/(newCourse.maxAssignment) * newCourse.percentA)
var totalPts = assignmentPts + midtermPts + finalPts
func appendtoBB() {
for (var index = 0; index < 4; index++) {
if bbTFone == nil {
self.bbTFone.text = courseArray[0].courseName
} else if (bbTFtwo == nil) {
self.bbTFtwo.text = courseArray[1].courseName
} else if (bbTFthree == nil) {
self.bbTFthree.text = courseArray[2].courseName
} else {
self.bbTFfour.text = courseArray[3].courseName
}
}
}
func courseGrade() {
if totalPts > 90 {
bbImgOne.image = UIImage(named: "grade_a")
} else if totalPts > 80 {
bbImgTwo.image = UIImage(named: "grade_b")
} else if totalPts > 70 {
bbImgTwo.image = UIImage(named: "grade_c")
} else if totalPts > 60 {
bbImgTwo.image = UIImage(named: "grade_d")
} else {
bbImgTwo.image = UIImage(named: "grade_f")
}
}
appendtoBB()
courseGrade()
}
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.
}
}
谁能给我指一下正确的方向吗？谢谢 在故事板中是否将ViewController设置为初始ViewController？是的，它设置为初始ViewController检查您与插座的连接，确保它们仍然正确。如果更改了名称，则必须删除该连接。将助手编辑器与connections属性视图结合使用。当您获得SIGABRT时，控制台中是否输出了任何内容？
import UIKit
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
// Override point for customization after application launch.
return true
}
func applicationWillResignActive(application: UIApplication) {
// Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
// Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
}
func applicationDidEnterBackground(application: UIApplication) {
// Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
// If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
}
func applicationWillEnterForeground(application: UIApplication) {
// Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
}
func applicationDidBecomeActive(application: UIApplication) {
// Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
}
func applicationWillTerminate(application: UIApplication) {
// Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
}
}