我想通过链接打开网页。我正在使用该地址作为全局变量。但是,当我运行全局函数时,会发生错误。是什么原因?
GlobalValue.swift
import Foundation
struct Global {
let apiAddress = "http://11.111.111.111:11111/"
let LinkURL: String
let LinkSecond : String
init()
{
agreeLinkURL = "User?type=webview"
agreeLinkSecond = "User2?type=webview"
}
func getURL() -> String {
return apiAddress + LinkURL
}
func getURLSecond() -> String {
return apiAddress + LinkSecond
}
}
用法
let dataUrl = Global()
class ViewController: UIViewController {
...
@IBAction func DetailFuc(_ sender: Any) {
let detailUrl = dataUrl.getURL() // get error
print("***********************************************")
print(detailUrl)
print("***********************************************")
if let appURL = URL(string: detailUrl) {
UIApplication.shared.open(appURL) { success in
if success {
print("The URL was delivered successfully.")
} else {
print("The URL failed to open.")
}
}
} else {
print("Invalid URL specified.")
}
}
错误是:
2019-09-05 15:03:06.094723+0900 testap[24311:376425] -[testap.ViewController Detailfuc:]: unrecognized selector sent to instance 0x7ff27fe2d480 2019-09-05 15:03:06.102115+0900 testap[24311:376425] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[testap.ViewController Detailfuc:]: unrecognized selector sent to instance 0x7ff27fe2d480' *** First throw call stack: ( 0 CoreFoundation 0x0000000105a618db __exceptionPreprocess + 331 1 libobjc.A.dylib 0x0000000103fb8ac5 objc_exception_throw + 48 2 CoreFoundation 0x0000000105a7fc94 -[NSObject(NSObject) doesNotRecognizeSelector:] + 132 3 UIKitCore 0x000000010f0bb235 -[UIResponder doesNotRecognizeSelector:] + 287 4 CoreFoundation 0x0000000105a66623 ___forwarding___ + 1443 5 CoreFoundation 0x0000000105a68418 _CF_forwarding_prep_0 + 120 6 UIKitCore 0x000000010f090624 -[UIApplication sendAction:to:from:forEvent:] + 83 7 UIKitCore 0x000000010eae58d5 -[UIControl sendAction:to:forEvent:] + 67 8 UIKitCore 0x000000010eae5bf2 -[UIControl _sendActionsForEvents:withEvent:] + 450 9 UIKitCore 0x000000010eae4ba8 -[UIControl touchesEnded:withEvent:] + 583 10 UIKitCore 0x000000010f0c94e6 -[UIWindow _sendTouchesForEvent:] + 2547 11 UIKitCore 0x000000010f0cabca -[UIWindow sendEvent:] + 4079 12 UIKitCore 0x000000010f0a930e -[UIApplication sendEvent:] + 356 13 UIKitCore 0x000000010f1792b3 __dispatchPreprocessedEventFromEventQueue + 3232 14 UIKitCore 0x000000010f17bbd9 __handleEventQueueInternal + 5911 15 CoreFoundation 0x00000001059c8db1 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17 16 CoreFoundation 0x00000001059c8633 __CFRunLoopDoSources0 + 243 17 CoreFoundation 0x00000001059c2cef __CFRunLoopRun + 1231 18 CoreFoundation 0x00000001059c24d2 CFRunLoopRunSpecific + 626 19 GraphicsServices 0x000000010a69f2fe GSEventRunModal + 65 20 UIKitCore 0x000000010f08efc2 UIApplicationMain + 140 21 testap 0x00000001035c31eb main + 75 22 libdyld.dylib 0x0000000107dcf541 start + 1 ) l ibc++abi.dylib: terminating with uncaught exception of type NSException
设置全局变量时,一定有问题,但是我不知道出了什么问题。请让我知道如何解决此问题。调用网页的方法正确吗?
答案 0 :(得分:0)
如您所见:
原因:“-[testap.ViewController Detailfuc:]:无法识别的选择器已发送到实例0x7ff27fe2d480”
这不是问题。崩溃的原因是您将大写Detailfuc
的{{1}}重命名为DetailFuc
。因此它找不到具有小写字母F
并崩溃的原始函数。
每次更改目标时,都应从按钮上断开错误的IBAction。
您可以右键单击按钮以查看连接,然后单击x以使用小写f
的错误连接
答案 1 :(得分:0)
您是否一直在使用旧版本的Xcode 8 Beta?
当我在Xcode 8 Beta 6中尝试相同的操作时:
我将鼠标移到类别文件上,说使用发件人UIButton以及标题“ doPrint”来开发一个动作。
Xcode生成了这个:
@IBAction func doPrint(_ sender: AnyObject) {
}
当您希望使用Objective C选择器“ doPrint:”创建方法时,必须在Swift 3的第一个参数之前放置“ _”。 更多信息here
答案 2 :(得分:0)
(原因:'-[testap.ViewController Detailfuc :]:无法识别的选择器)
将情节提要中的插座对象连接到视图控制器中的代码时,在右键单击情节提要中的对象并按链接该主题的x按钮时,无法在断开名称之前随时修改名称。对象与代码,然后在代码中修改名称后,再次将其链接。