我现在对上面的标题有同样的问题,但还没有找到正确的答案.我收到了错误:
/Users/nle/Library/Developer/Xcode/DerivedData/TestMoboSDK-Client-cgodalyxmwqzynaxfbbewrooymnq/Build/Intermediates/TestMoboSDK-Client.build/Debug-iphonesimulator/TestMoboSDK-Client.build/Objects-normal/x86_64/MoboSDK.o
/Users/nle/Library/Developer/Xcode/DerivedData/TestMoboSDK-Client-cgodalyxmwqzynaxfbbewrooymnq/Build/Products/Debug-iphonesimulator/libMoboSDK.a(MoboSDK.o)
duplicate symbol _OBJC_METACLASS_$_MoboSDK in:
/Users/nle/Library/Developer/Xcode/DerivedData/TestMoboSDK-Client-cgodalyxmwqzynaxfbbewrooymnq/Build/Intermediates/TestMoboSDK-Client.build/Debug-iphonesimulator/TestMoboSDK-Client.build/Objects-normal/x86_64/MoboSDK.o
/Users/nle/Library/Developer/Xcode/DerivedData/TestMoboSDK-Client-cgodalyxmwqzynaxfbbewrooymnq/Build/Products/Debug-iphonesimulator/libMoboSDK.a(MoboSDK.o)
ld: 75 duplicate symbols for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
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任何帮助表示赞赏.
最后 我找出了这个错误的原因,因为我加入-ObjC了Other Linker Flags.删除此值后,我可以成功构建我的项目,但我不知道为什么.有谁能解释一下?
我使用Mac OS:10.9.2.当我将Xcode更新到5.1.1时,App Store会询问苹果ID.我已经注销了当前的苹果ID并登录了我的帐户,但它也会询问旧苹果ID的密码(我无法点击Apple ID字段来更改名称).请帮我改变苹果ID或删除旧的.

编辑
最后,我可以解决这个问题.我移动垃圾箱中的所有Xcode版本.然后前往App Store,使用Apple ID安装新版本的Xcode.
我的应用程序使用Geojson文件.我使用MapBox SDK添加MGLPolyline到地图.但问题是我的文件太大,以至于应用程序崩溃并收到错误:Message from debugger: Terminated due to memory issue.我在第一次循环时面对66234个对象.我试图将数组块化为新数组,但没有成功.请帮我解决问题.这是我在地图上绘制的代码,这里是我在github上的测试项目使用Xcode 8.1 如果有任何不同的第三方可以解决我的问题,也欢迎:
func drawPolyline() {
// Parsing GeoJSON can be CPU intensive, do it on a background thread
DispatchQueue.global(qos: .background).async {
// Get the path for example.geojson in the app's bundle
let jsonPath = Bundle.main.path(forResource: "KMLMAPNew", ofType: "json")
let jsonData = NSData(contentsOfFile: jsonPath!)
do {
// Load and serialize the GeoJSON into a dictionary filled with properly-typed objects
guard …Run Code Online (Sandbox Code Playgroud) 我是Swift Apple的新手.我从这里读过一篇文章
但是不知道该怎么做(或者只是简单的不知道如何使用resizableImageWithCapInsetsSwift).请帮我resizableImageWithCapInsets在Swift中使用
我将GoogleConversionTrackingSDK添加到我的项目中,然后调用该函数:[ACTConversionReporter reportWithConversionID:@"972050884" label:@"Bzk1CIzPkAkQxKPBzwM" value:@"0" isRepeatable:NO];
然后我的应用程序崩溃.这是堆栈跟踪:
'NSInvalidArgumentException', reason: '+[NSDate act_secondsSince1970]: unrecognized selector sent to class 0x10225d8d0'
*** First throw call stack:
(
0 CoreFoundation 0x000000010210f495 __exceptionPreprocess + 165
1 libobjc.A.dylib 0x0000000101bd499e objc_exception_throw + 43
2 CoreFoundation 0x00000001021a055d +[NSObject(NSObject) doesNotRecognizeSelector:] + 205
3 CoreFoundation 0x0000000102100d8d ___forwarding___ + 973
4 CoreFoundation 0x0000000102100938 _CF_forwarding_prep_0 + 120
5 TestMoboSDK-Client 0x00000001000143cb -[ACTReporterPrivate commonQueryParameters] + 84
6 TestMoboSDK-Client 0x0000000100014779 -[ACTReporterPrivate report] + 98
7 TestMoboSDK-Client 0x000000010001177a -[ACTReporter report] + 75
8 TestMoboSDK-Client 0x00000001000118d4 +[ACTConversionReporter reportWithConversionID:label:value:isRepeatable:] …Run Code Online (Sandbox Code Playgroud) 我尝试理解函数currying教程但该代码似乎已过时.功能调整还不是很清楚.
我试试这个功能:
func curry<A, B, C>(_ f: @escaping (A, B) -> C) -> (A) -> (B) -> C {
return { a in { b in f(a, b)} }
}
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它运行正常Playground (Xcode 9 beta 6).但问题是我无法使用此功能作为教程:
let add = curry(+)
let xs = 1...100
let x = xs.map(add(2))
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上面的代码返回错误:
Playground execution failed:
error: FunctionsCurrying.playground:31:17: error: ambiguous use of operator '+'
let add = curry(+)
^
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请指正,并帮我澄清一下function currying.
我用Alamorefire,Swift 3但得到了错误:Ambiguous reference to member 'upload.这是我的代码:
Alamofire.upload(
.post,
url,
multipartFormData: { multipartFormData in
// import parameters
for i in 0 ..< params.count {
for (key, value) in params[i] {
multipartFormData.appendBodyPart(data: value.dataUsingEncoding(NSUTF8StringEncoding)!,
name: key)
}
}
// import image to request
multipartFormData.appendBodyPart(data: imageData,
name: "file",
fileName: "file.jpg",
mimeType: "image/jpeg")
},
encodingMemoryThreshold: SessionManager.multipartFormDataEncodingMemoryThreshold,
encodingCompletion: { encodingResult in
switch encodingResult {
case .Success(let upload, _, _):
upload.responseJSON { response in
debugPrint(response.result)
}
case .Failure(let encodingError):
print(encodingError)
} …Run Code Online (Sandbox Code Playgroud) 我知道有很多相同的问题,但仍然找不到修复错误的方法.请参阅图片了解更多详情.我使用了Xcode 7和swift 2.0
编辑:搞砸Swift的警告.finnaly (change?[NSKeyValueChangeNewKey]?.boolValue)!修正了错误
请帮帮我,我使用Xcode 8.3(swift 3.1),功能trimmingCharacters不起作用.我的代码如下:
func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
if var searchStr = textField.text{
let _searchStr = searchStr.trimmingCharacters(in: .whitespaces)
print("After trimming:\(_searchStr)")
}
}
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文本字段中的输入是409 hu?nh,打印结果409 hu?nh 不符合预期:409huỳnh.