1，Method with objecive-c selector conflicts with prevIoUs
问题答案在这里
http://stackoverflow.com/questions/29457720/compiler-error-method-with-objective-c-selector-conflicts-with-prevIoUs-declara
方法两个，
a，前面加 private
b，上一行加
@nonobjc原文链接：https://www.f2er.com/swift/325533.html
