Tip Calculator is a tip calculator application for iOS.
Submitted by: Jennifer Dwinall
Time spent: 4.5 hours spent in total
The following required functionality is complete:
- [✔️] User can enter a bill amount, choose a tip percentage, and see the tip and total values.
- [✔️] Settings page to change the default tip percentage.
The following optional features are implemented:
- UI animations
- [✔️] Remembering the bill amount across app restarts (if <10mins)
- [✔️] Using locale-specific currency.
- Using locale-specific currency thousands separators.
- Making sure the keyboard is always visible and the bill amount is always the first responder. This way the user doesn't have to tap anywhere to use this app. Just launch the app and start typing.
The following additional features are implemented:
- List anything else that you can get done to improve the app functionality!
Here's a walkthrough of implemented user stories:
GIF created with LiceCap.
As part of your pre-work submission, please reflect on the app and answer the following questions below:
Question 1: "What are your reactions to the iOS app development platform so far? How would you describe outlets and actions to another developer? Bonus: any idea how they are being implemented under the hood? (It might give you some ideas if you right-click on the Storyboard and click Open As->Source Code")
Answer: Outlets and actions are attached to UI elements on the storyboard. The viewController talks to the view using an outlet. Outlets are properties in the viewController. The properties have getters and setters and facilitate property control. Views pass on data to the viewController using actions. Actions are methods in the viewController. Actions handle UI triggers.
Question 2: "Swift uses Automatic Reference Counting (ARC), which is not a garbage collector, to manage memory. Can you explain how you can get a strong reference cycle for closures? (There's a section explaining this concept in the link, how would you summarize as simply as possible?)"
Answer: [Enter your answer here in a paragraph or two].
Copyright [2017] [Jennifer Dwinall]
Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.