UILabel dynamic digital extention base on GCD and Method-Swizzling, support float and Integer Conversion
UILabel 基于 GCD 和方法交换的动态数字扩展,支持浮点数和整数互转，需要自取
// Set your animation duration and everything is done. "dynamicDigitalAnimation = 0" represents no animation.
yourUILabel.dynamicDigitalAnimation = 1;
// Set your origin digital number.
yourUILabel.text = @"0";
// Set your target digital number,it cause an animation automatically.
yourUILabel.text = @"25"
