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我的项目应该创建一个包含动物名称列表的窗口,但是当用户选择一个名称(一行)时,用户将被传送到另一个包含动物描述的窗口。
这是 Animal 类(注意:错误出现在这个类中)
import UIKit
class Animal
{
var name: String
var shortDescription: String
var longDescription: String
init(name: String, shortDescription: String, longDescription: String)
{
self.name = name
self.shortDescription = shortDescription
self.longDescription = longDescription
}
let animals = [
Animal(name: "Cow", //THIS LINE IS THE ERROR: Thread 1: EXC_BAD_ACCESS (code=2, address=0x7ff54b59ff8)
shortDescription: "Cattle",
longDescription: "A cow is a mature female and bull of an adult male of a bovine family. A heifer is a female cow that hasn't had a calf yet. Cattle is the name for the whole cow family. THere are about 920 different breeds of cows in the world."),
Animal(name: "Bird",
shortDescription: "Usually small, has wings, feathers, and can fly.",
longDescription: "A warm-blooded egg-laying vertebrate distinguished by the possession of feathers, wings, and a beak and (typically) by being able to fly."),
Animal(name: "Dolphin",
shortDescription: "A large fish",
longDescription: "A small gregarious toothed whale that typically has a beaklike snout and a curved fin on the back. Dolphins have become well known for their sociable nature and high intelligence."),
Animal(name: "Dog",
shortDescription: "Man's best friend",
longDescription: "A domesticated carnivorous mammal that typically has a long snout, an acute sense of smell, and a barking, howling, or whining voice. It is widely kept as a pet or for work or field sports."),
Animal(name: "Zebra",
shortDescription: "A horse with white and black stripes",
longDescription: "An African wild horse with black-and-white stripes and an erect mane."),
Animal(name: "Owl",
shortDescription: "A large bird that usually comes out at night",
longDescription: "A nocturnal bird of prey with large forward-facing eyes surrounded by facial disks, a hooked beak, and typically a loud call."),
Animal(name: "Camel",
shortDescription: "A horse-like animal that travels the deserts",
longDescription: "A large, long-necked ungulate mammal of arid country, with long slender legs, broad cushioned feet, and either one or two humps on the back. Camels can survive for long periods without food or drink, chiefly by using up the fat reserves in their humps."),
Animal(name: "Lizard",
shortDescription: "A green animal that is very small and has four legs",
longDescription: "A reptile that typically has a long body and tail, four legs, movable eyelids, and a rough, scaly, or spiny skin."),
Animal(name: "Monkey",
shortDescription: "A furry animal that climbs trees.",
longDescription: "A small to medium-sized primate that typically has a long tail, most kinds of which live in trees in tropical countries."),
Animal(name: "Jaguar",
shortDescription: "A very fast animal with four legs and lots of fur",
longDescription: "A large, heavily built cat that has a yellowish-brown coat with black spots, found mainly in the dense forests of Central and South America."),
Animal(name: "Chicken",
shortDescription: "A small legged animal with a red nose.",
longDescription: "A domestic fowl kept for its eggs or meat, especially a young one."),
Animal(name: "Mouse",
shortDescription: "A very small creature with a tail.",
longDescription: "a small rodent that typically has a pointed snout, relatively large ears and eyes, and a long tail.")]
}
Here is the AppDelegate class
import UIKit
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate
{
let animals = [
Animal(name: "Cow",
shortDescription: "Cattle",
longDescription: "A cow is a mature female and bull of an adult male of a bovine family. A heifer is a female cow that hasn't had a calf yet. Cattle is the name for the whole cow family. THere are about 920 different breeds of cows in the world."),
Animal(name: "Bird",
shortDescription: "Usually small, has wings, feathers, and can fly.",
longDescription: "A warm-blooded egg-laying vertebrate distinguished by the possession of feathers, wings, and a beak and (typically) by being able to fly."),
Animal(name: "Dolphin",
shortDescription: "A large fish",
longDescription: "A small gregarious toothed whale that typically has a beaklike snout and a curved fin on the back. Dolphins have become well known for their sociable nature and high intelligence."),
Animal(name: "Dog",
shortDescription: "Man's best friend",
longDescription: "A domesticated carnivorous mammal that typically has a long snout, an acute sense of smell, and a barking, howling, or whining voice. It is widely kept as a pet or for work or field sports."),
Animal(name: "Zebra",
shortDescription: "A horse with white and black stripes",
longDescription: "An African wild horse with black-and-white stripes and an erect mane."),
Animal(name: "Owl",
shortDescription: "A large bird that usually comes out at night",
longDescription: "A nocturnal bird of prey with large forward-facing eyes surrounded by facial disks, a hooked beak, and typically a loud call."),
Animal(name: "Camel",
shortDescription: "A horse-like animal that travels the deserts",
longDescription: "A large, long-necked ungulate mammal of arid country, with long slender legs, broad cushioned feet, and either one or two humps on the back. Camels can survive for long periods without food or drink, chiefly by using up the fat reserves in their humps."),
Animal(name: "Lizard",
shortDescription: "A green animal that is very small and has four legs",
longDescription: "A reptile that typically has a long body and tail, four legs, movable eyelids, and a rough, scaly, or spiny skin."),
Animal(name: "Monkey",
shortDescription: "A furry animal that climbs trees.",
longDescription: "A small to medium-sized primate that typically has a long tail, most kinds of which live in trees in tropical countries."),
Animal(name: "Jaguar",
shortDescription: "A very fast animal with four legs and lots of fur",
longDescription: "A large, heavily built cat that has a yellowish-brown coat with black spots, found mainly in the dense forests of Central and South America."),
Animal(name: "Chicken",
shortDescription: "A small legged animal with a red nose.",
longDescription: "A domestic fowl kept for its eggs or meat, especially a young one."),
Animal(name: "Mouse",
shortDescription: "A very small creature with a tail.",
longDescription: "a small rodent that typically has a pointed snout, relatively large ears and eyes, and a long tail.")]
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:.
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let animal:Animal = animals[indexPath.row]
let cell = tableView.dequeueReusableCellWithIdentifier("Animal name", forIndexPath: indexPath) as UITableViewCell
/*var name: String
var shortDescription: String
var longDescription: String
// Configure the cell...
*/
cell.textLabel?.text = animal.name
cell.detailTextLabel?.text = animal.shortDescription
return cell
}
}
/*
override func tableView(tableView: UITableView,
didSelectRowAtIndexPath indexPath: NSIndexPath) {
let title = "Wine List"
let message = "You have selected \(wines[indexPath.row].name)"
let alertController = UIAlertController(title: title, message: message, preferredStyle: .Alert)
let okayAction = UIAlertAction(title: "Okay", style: .Default, handler: nil)
alertController.addAction(okayAction)
presentViewController(alertController, animated: true, completion: nil)
self.tableView.deselectRowAtIndexPath(indexPath, animated: true)
}
override func tableView(tableView: UITableView,
accessoryButtonTappedForRowWithIndexPath indexPath: NSIndexPath) {
let wine = wines[indexPath.row]
let title = wine.name
let message = wine.longDescription
let alertController = UIAlertController(title: title, message: message, preferredStyle: .ActionSheet)
let okayAction = UIAlertAction(title: "Okay", style: .Default, nil)
alertController.addAction(okayAction)
presentViewController(alertController, animated: true, completion: nil)
self.tableView.deselectRowAtIndexPath(indexPath, animated: true)
}
// Override to support conditional editing of the table view.
override func tableView(tableView: UITableView, canEditRowAtIndexPath indexPath: NSIndexPath) -> Bool {
// Return NO if you do not want the specified item to be editable.
return true
}
// Override to support editing the table view.
override func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
if editingStyle == .Delete {
// Delete the row from the data source
tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: .Fade)
} else if editingStyle == .Insert {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
}
}
// Override to support rearranging the table view.
override func tableView(tableView: UITableView, moveRowAtIndexPath fromIndexPath: NSIndexPath, toIndexPath: NSIndexPath) {
}
// Override to support conditional rearranging of the table view.
override func tableView(tableView: UITableView, canMoveRowAtIndexPath indexPath: NSIndexPath) -> Bool {
// Return NO if you do not want the item to be re-orderable.
return true
}}
这是 AnimalListTableViewController 类
import UIKit
class AnimalListTableViewController: UITableViewController
{ var name: String
var shortDescription: String
var longDescription: String
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 12}
override func prepareForSegue(segue: UIStoryboardSegue,
sender: AnyObject?){
if let detailViewController = segue.destinationViewController as? DetailViewController, let indexPath = self.tableView.indexPathForSelectedRow {
detailViewController.animal = animals[indexPath.row]}}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")}
let animals = [
Animal(name: "Cow",
shortDescription: "Cattle",
longDescription: "A cow is a mature female and bull of an adult male of a bovine family. A heifer is a female cow that hasn't had a calf yet. Cattle is the name for the whole cow family. THere are about 920 different breeds of cows in the world."),
Animal(name: "Bird",
shortDescription: "Usually small, has wings, feathers, and can fly.",
longDescription: "A warm-blooded egg-laying vertebrate distinguished by the possession of feathers, wings, and a beak and (typically) by being able to fly."),
Animal(name: "Dolphin",
shortDescription: "A large fish",
longDescription: "A small gregarious toothed whale that typically has a beaklike snout and a curved fin on the back. Dolphins have become well known for their sociable nature and high intelligence."),
Animal(name: "Dog",
shortDescription: "Man's best friend",
longDescription: "A domesticated carnivorous mammal that typically has a long snout, an acute sense of smell, and a barking, howling, or whining voice. It is widely kept as a pet or for work or field sports."),
Animal(name: "Zebra",
shortDescription: "A horse with white and black stripes",
longDescription: "An African wild horse with black-and-white stripes and an erect mane."),
Animal(name: "Owl",
shortDescription: "A large bird that usually comes out at night",
longDescription: "A nocturnal bird of prey with large forward-facing eyes surrounded by facial disks, a hooked beak, and typically a loud call."),
Animal(name: "Camel",
shortDescription: "A horse-like animal that travels the deserts",
longDescription: "A large, long-necked ungulate mammal of arid country, with long slender legs, broad cushioned feet, and either one or two humps on the back. Camels can survive for long periods without food or drink, chiefly by using up the fat reserves in their humps."),
Animal(name: "Lizard",
shortDescription: "A green animal that is very small and has four legs",
longDescription: "A reptile that typically has a long body and tail, four legs, movable eyelids, and a rough, scaly, or spiny skin."),
Animal(name: "Monkey",
shortDescription: "A furry animal that climbs trees.",
longDescription: "A small to medium-sized primate that typically has a long tail, most kinds of which live in trees in tropical countries."),
Animal(name: "Jaguar",
shortDescription: "A very fast animal with four legs and lots of fur",
longDescription: "A large, heavily built cat that has a yellowish-brown coat with black spots, found mainly in the dense forests of Central and South America."),
Animal(name: "Chicken",
shortDescription: "A small legged animal with a red nose.",
longDescription: "A domestic fowl kept for its eggs or meat, especially a young one."),
Animal(name: "Mouse",
shortDescription: "A very small creature with a tail.",
longDescription: "a small rodent that typically has a pointed snout, relatively large ears and eyes, and a long tail.")]}
这是 AppDelegate 类
import UIKit
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate
{
let animals = [
Animal(name: "Cow",
shortDescription: "Cattle",
longDescription: "A cow is a mature female and bull of an adult male of a bovine family. A heifer is a female cow that hasn't had a calf yet. Cattle is the name for the whole cow family. THere are about 920 different breeds of cows in the world."),
Animal(name: "Bird",
shortDescription: "Usually small, has wings, feathers, and can fly.",
longDescription: "A warm-blooded egg-laying vertebrate distinguished by the possession of feathers, wings, and a beak and (typically) by being able to fly."),
Animal(name: "Dolphin",
shortDescription: "A large fish",
longDescription: "A small gregarious toothed whale that typically has a beaklike snout and a curved fin on the back. Dolphins have become well known for their sociable nature and high intelligence."),
Animal(name: "Dog",
shortDescription: "Man's best friend",
longDescription: "A domesticated carnivorous mammal that typically has a long snout, an acute sense of smell, and a barking, howling, or whining voice. It is widely kept as a pet or for work or field sports."),
Animal(name: "Zebra",
shortDescription: "A horse with white and black stripes",
longDescription: "An African wild horse with black-and-white stripes and an erect mane."),
Animal(name: "Owl",
shortDescription: "A large bird that usually comes out at night",
longDescription: "A nocturnal bird of prey with large forward-facing eyes surrounded by facial disks, a hooked beak, and typically a loud call."),
Animal(name: "Camel",
shortDescription: "A horse-like animal that travels the deserts",
longDescription: "A large, long-necked ungulate mammal of arid country, with long slender legs, broad cushioned feet, and either one or two humps on the back. Camels can survive for long periods without food or drink, chiefly by using up the fat reserves in their humps."),
Animal(name: "Lizard",
shortDescription: "A green animal that is very small and has four legs",
longDescription: "A reptile that typically has a long body and tail, four legs, movable eyelids, and a rough, scaly, or spiny skin."),
Animal(name: "Monkey",
shortDescription: "A furry animal that climbs trees.",
longDescription: "A small to medium-sized primate that typically has a long tail, most kinds of which live in trees in tropical countries."),
Animal(name: "Jaguar",
shortDescription: "A very fast animal with four legs and lots of fur",
longDescription: "A large, heavily built cat that has a yellowish-brown coat with black spots, found mainly in the dense forests of Central and South America."),
Animal(name: "Chicken",
shortDescription: "A small legged animal with a red nose.",
longDescription: "A domestic fowl kept for its eggs or meat, especially a young one."),
Animal(name: "Mouse",
shortDescription: "A very small creature with a tail.",
longDescription: "a small rodent that typically has a pointed snout, relatively large ears and eyes, and a long tail.")]
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:.
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let animal:Animal = animals[indexPath.row]
let cell = tableView.dequeueReusableCellWithIdentifier("Animal name", forIndexPath: indexPath) as UITableViewCell
/*var name: String
var shortDescription: String
var longDescription: String
// Configure the cell...
*/
cell.textLabel?.text = animal.name
cell.detailTextLabel?.text = animal.shortDescription
return cell
}
}
/*
override func tableView(tableView: UITableView,
didSelectRowAtIndexPath indexPath: NSIndexPath) {
let title = "Wine List"
let message = "You have selected \(wines[indexPath.row].name)"
let alertController = UIAlertController(title: title, message: message, preferredStyle: .Alert)
let okayAction = UIAlertAction(title: "Okay", style: .Default, handler: nil)
alertController.addAction(okayAction)
presentViewController(alertController, animated: true, completion: nil)
self.tableView.deselectRowAtIndexPath(indexPath, animated: true)
}
override func tableView(tableView: UITableView,
accessoryButtonTappedForRowWithIndexPath indexPath: NSIndexPath) {
let wine = wines[indexPath.row]
let title = wine.name
let message = wine.longDescription
let alertController = UIAlertController(title: title, message: message, preferredStyle: .ActionSheet)
let okayAction = UIAlertAction(title: "Okay", style: .Default, nil)
alertController.addAction(okayAction)
presentViewController(alertController, animated: true, completion: nil)
self.tableView.deselectRowAtIndexPath(indexPath, animated: true)
}
// Override to support conditional editing of the table view.
override func tableView(tableView: UITableView, canEditRowAtIndexPath indexPath: NSIndexPath) -> Bool {
// Return NO if you do not want the specified item to be editable.
return true
}
// Override to support editing the table view.
override func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
if editingStyle == .Delete {
// Delete the row from the data source
tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: .Fade)
} else if editingStyle == .Insert {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
}
}
// Override to support rearranging the table view.
override func tableView(tableView: UITableView, moveRowAtIndexPath fromIndexPath: NSIndexPath, toIndexPath: NSIndexPath) {
}
// Override to support conditional rearranging of the table view.
override func tableView(tableView: UITableView, canMoveRowAtIndexPath indexPath: NSIndexPath) -> Bool {
// Return NO if you do not want the item to be re-orderable.
return true
}
*/
这是 DetailViewController 类
import UIKit
class DetailViewController: UIViewController
{
@IBOutlet weak var titleLabel: UILabel!
@IBOutlet weak var descriptionLabel: UILabel!
var a = Animal?()
var animal: Animal?
override func viewWillAppear(animated: Bool)
{
titleLabel.text = a!.name
descriptionLabel.text = a!.longDescription
}
override func viewDidLoad()
{
viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning()
{
didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
这是 Storyboard。
最佳答案
您可能需要 Animal
的静态属性。
将 animals
声明更改为:
static let animals = [...]
任何你想访问动物数组的地方,使用这个:
Animal.animals
你遇到的问题是,当你创建一个动物时,它有一个实例化更多动物的属性(数组),并且每个动物实例化更多动物,依此类推,导致无限循环。
关于ios - Swift xcode 错误 : Thread 1: EXC_BAD_ACCESS (code=2, 地址=0x7ff54b59ff8),我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/35666148/
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只想知道 xcode 项目中事件可执行文件的目的是什么? 谢谢 索拉布 最佳答案 自己找到了..希望它会帮助某人。 您可以在其中运行和测试软件产品的可执行环境。可执行环境定义了应该用来运行产品的程序。
刚回到我的办公 table ,Xcode 一直在文件中突出显示/强调空白区域。如果我输入一些东西它就会消失,但如果我切换标签并回来,它们会重新出现。 更新:这不是由“显示隐形”选项引起的。那看起来不一
我首先注意到这一点 Cmd-/偶尔拒绝为注释取消注释的代码行工作。但是现在(刚刚使用 XCode 4.1,虽然这可能无关)它发生在 Cmd-B建立。 我无法弄清楚我正在做什么导致这种情况,或者是否有任
我不太了解Xcode 4的工作区的实用程序。它们的用途是什么,它们如何帮助Xcode进行开发? 最佳答案 例如。您有一个在两个应用程序中使用的库。您很可能为此库拥有一个自己的项目,对吗?现在,您可以自
我正在关注一个应用程序教程,它说: “接下来,在 Xcode 应用程序项目目录的根目录下创建一个空文件,并调用该文件 Podfile。使用您喜欢的文本编辑器打开它,然后在其中粘贴以下行:” 我很困惑这
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