摘要：Splitting big tasks into small tasks is often one of the best ways to solve a problem. Thus, in the next few exercises, we will split each request/met... 阅读全文

摘要：Putting the keyword static in front of a local variable declaration creates a specialtype of variable, a so-called static local variable. This variabl... 阅读全文

摘要：func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool { // 创造个除“1234567... 阅读全文

摘要：Image Picker Controller@IBAction func experiment() { let controller = UIImagePickerController() self.presentViewController(controller, a... 阅读全文

摘要：1 UITabBarController *tabBarController =[[UITabBarController alloc] init];2 CGRect frame = self.window.bounds;3 tabBarController.tabBar.frame ... 阅读全文