三十一天iphone开发实例，按照天数，每天一个iphone代码例子，第一天 时钟显示器，第二天是火焰动画第三天拨打电话，第四天 显示ip，第五天计时器-Thirty-one days iphone development instance, according to the number of days, each day an iphone code example, the first day is a clock display, the next day is the third da