ios 在 Swift 中使用 isKindOf
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Using isKindOf in Swift
提问by Wangdu Lin
I use Xcode 8.0 beta to test my app, but after it convert my code 2.2 to 3.0, came out many unsolved bugs. Below the demo, Xcode8.0 appear the error message
我使用 Xcode 8.0 beta 来测试我的应用程序,但是在将我的代码 2.2 转换为 3.0 之后,出现了许多未解决的错误。在demo下方,Xcode8.0出现错误信息
1. Expected "{" after "if" condition...
1.“if”条件后应为“{”...
if annotation.isKindof: (MKUserLocation) {
return nil
}
Second error is the map kit...I use iskind(of: MKUserLocation) still not work out, it will appear another error message
第二个错误是地图工具包...我使用 iskind(of: MKUserLocation) 仍然无法解决,它会出现另一个错误消息
2.Braced block of statements is an unused closure
2.Braced 语句块是一个未使用的闭包
if annotation.isKindof: (MKUserLocation) {
return nil
}
3. Missing argument label 'of:' in call
3. 调用中缺少参数标签“of:”
if annotation.isKind(of: MKUserLocation) {
return nil
}
回答by Sahil Kapoor
The substitute for isKindOf
in Swift3
is:
isKindOf
in的替代品Swift3
是:
if annotation is MKUserLocation {
return nil
}