自学ios：segues
action seques['segwei] 联线:
1) modal: slide a scene from the bottom to the top, covered on the parent scene.
2) push: slide from right to left.
3) custom
action seques['segwei] 联线:
1) modal: slide a scene from the bottom to the top, covered on the parent scene.
2) push: slide from right to left.
3) custom