Swift-Enum Inheritance protocol

Original Address link: http://blog.csdn.net/duanyipeng/article/details/32338575

Apple Official document: The Swift programming Language
The Protocols and Extensions section practice requires that you define a enumeration enumeration type yourself and follow the Exampleprotocol protocol:

　　

1. Protocol Exampleprotocol {
2. var simpledescription:string {Get}
3. Mutating func adjust ()
4. }

Enumerate inheritance Protocols

2. Enum Enumconformtoprotocol:exampleprotocol {
4. Case first (string), Second (String), third (string)
8. var simpledescription:string {
10. get {
12. switch self {
14. Case let . First (text):
16. return text
18. Case let . Second (text):
20. return text
22. Case let . Third (text):
24. return text
26. Default:
28. return "Get Error"
30. }
32. }
34. set {
36. switch self {
38. Case let . First (text):
40. Self = . First (newvalue)
42. Case let . Second (text):
44. Self = . Second (newvalue)
46. Case let . Third (text):
48. Self = . Third (newvalue)
50. }
52. }
54. }
56. Mutating func adjust () {
58. switch self {
60. Case let . First (text):
62. Self = . First (text + "(first case adjusted)")
64. Case let . Second (text):
66. Self = . Second (text + "(Second case adjusted)")
68. Case let . Third (text):
70. Self = . Third (text + "(third case adjusted)")
72. }
74. }
76. }
78. var enumconformtoprotocoltest = Enumconformtoprotocol. First ("Firstval")
80. Enumconformtoprotocoltest. Simpledescription
82. Enumconformtoprotocoltest. Adjust ()
84. Enumconformtoprotocoltest. Simpledescription
88. Enumconformtoprotocoltest = Enumconformtoprotocol. Third ("Thirdval")
90. Enumconformtoprotocoltest. Simpledescription
92. Enumconformtoprotocoltest. Adjust ()
94. Enumconformtoprotocoltest. Simpledescription
98. var e = Enumconformtoprotocol. Second ("Hello")
100. var text = e. simpledescription
102. E. simpledescription = "Adios"
104. Text = e. simpledescription
106. E. Adjust ()
108. Text = e. simpledescription

Swift-Enum Inheritance protocol