摘要: ProblemYou want to allow the users of your app to select from a list of values.SolutionUse the UIPickerView class.DiscussionA picker view is a graphic... 阅读全文
posted @ 2014-05-29 19:53 秋怀瑾 阅读(169) 评论(0) 推荐(0)
摘要: ProblemYou want to instantiate and display a map on a viewSolutionCreate an instance of the MKMapView class and add it to a view or assign it as a sub... 阅读全文
posted @ 2014-05-29 19:28 秋怀瑾 阅读(163) 评论(0) 推荐(0)