a magic loading button
####使用示例:
#import "JMMagicCircleButton.h"
使用:
JMMagicCircleButton *btn = [[JMMagicCircleButton alloc] initWithFrame:CGRectMake(100, 200, 150, 40) withColor:[UIColor blueColor] Title:@"登录"];
对按钮文字内容和效果的修改,直接修改frontShowBtn属性:
[btn.frontShowBtn setTitle:@"登录" forState:UIControlStateNormal];
####动画思路点击这里