增加dateDayString

TSSmalCoacopods/Classes/Ex/Date+Ex.swift

@@ -39,4 +39,10 @@ public extension Date {
         return dateString
     }
     
+    var dateDayString:String {
+        let dateFormatter = DateFormatter()
+        dateFormatter.dateFormat = "yyyyMMdd"
+        let dateString = dateFormatter.string(from: self)
+        return dateString
+    }
 }