remove function define
Update Lesson12Board.m
Update Lesson12Board.m
fix parentBorad.signal bug
Merge pull request #39 from qfish/master

Fix parentBoard bug
Update UIColor+BeeExtension.m

Fix String to Hex
fix：我这边是，点进lesson6，然后点开小虫子，里面没加载完，我就把小虫子关闭了，然后点返回，每次都会挂