@objc protocol CounterDataSource {
@objc optional func increment(forCount count: Int) -> Int
@objc optional var fixedIncrement: Int {
get }
}
- 我朋友说还有一种方式就是给协议写一个默认的实现,如下代码
protocol SSPSelectStockDelegate: NSObjectProtocol {
func onSelectStock(model: SSPStockModel)
}
extension SSPSelectStockDelegate {
func onSelectStock(model: SSPStockModel) {
}
}