Built-in apps for iOS

The Control Center provides you with quick access to the controls and apps you need most at any time. Just swipe up from any screen, including the lock screen, to switch to airplane mode, turn Wi-Fi on or off, adjust screen brightness, and more. You can even use the new flashlight for lighting. So many controls at your fingertips. You can turn on or off airplane mode, Wi-Fi, Bluetooth and Do Not Disturb mode, lock the orientation of the screen or adjust its brightness, play, pause or skip a song, connect AirPlay-enabled devices, and quickly use the flashlight and timer computer, calculator and camera.

No problem sending photos or documents via text message or email. But if someone is right next to you, a text message or email can suddenly feel like a huge effort. Enter AirDrop for iOS, which makes it fast and easy to share photos, videos, contacts, and everything from any app with a share button. Just tap *Share* and choose who you want to share it with. AirDrop uses Wi-Fi and Bluetooth to take care of the rest, requiring no setup and encrypting transfers to keep your shared content secure. With AirDrop, you can share photos or videos with one or more people you specify. Just tap the Share button, choose who you want to share it with, and AirDrop will do the rest for you. When running iOS 7, contacts in your address book who are running iOS 7 can automatically see you in AirDrop. But you can also make you visible to all nearby iOS 7 users, or hide you from anyone. Just one tap in Control Center and you're done. The recipient can choose to save everything you send. In this case, the content is saved to the appropriate location: the photo is in the Photos app, the pass is in Passbook, the contact information is in Address Book, and so on. Find my iPhone, iPad, iPod touch

Losing your iPhone sucks. Fortunately, there is the Find My iPhone feature that can help you find your iPhone. But if it's hard to get it back, new security features in iOS 7 can make it harder for others to use or sell your device. Turning off Find My iPhone or wiping your device requires your Apple ID and password. Find My iPhone can continue to display custom information even if the information on the device has been wiped. Whoever wants to reactivate the device will need your Apple ID and password. That said, your iPhone is still your iPhone, no matter where it is.

Software and hardware work together

Because Apple makes the hardware and operating systems for iPad, iPhone and iPod touch at the same time, everything works together seamlessly. This high level of integration allows apps to take advantage of Retina displays, Multi-Touch interfaces, accelerometers, three-axis gyroscopes, accelerated graphics and more hardware features. FaceTime is a perfect example. It uses two front and rear cameras, a display, a microphone, and a Wi-Fi network connection. This also makes iOS the most optimized and fastest mobile operating system. On October 17, 2007, Steve Jobs announced the Software Development Kit in an open letter posted on Apple's website. It will be available to third-party developers in February 2008. The software development kit was released on March 6, 2008 and allows developers to develop and test applications for iPhone and iPod touch, called iPhone Simulator. However, applications can only be released after paying the cost of the iPhone Development Program. Since the release of Xcode3.1, Xcode has become the development environment for the iPhone software development kit. The first beta version is iPhone SDK 1.2b1 (build 5A147p) which is available immediately after release.

Since iOS evolved from the core of Mac OS X, the development tools are also based on Xcode.

This SDK requires a Mac with an Intel processor and running Mac OS X Leopard system to be used. Other operating systems, including Microsoft's Windows operating system and older versions of Mac OS X, are not supported.

The SDK itself is free to download, but in order to release the software, developers must join the iPhone Developer Program, which requires payment to obtain Apple's approval. After joining, developers will receive a license that they can use to publish the software they write to Apple's App Store. There are three ways to publish software: through the App Store, through enterprise configuration to be used only among employees within the enterprise, or through Ad-hoc based upload to up to 100 iPhones.

The emergence of this form of releasing iPhone software prevents people from releasing software according to the GPLv3 authorization code. Any developer who writes any code under GPLv3 must also be licensed under GPLv3. At the same time, when developers distribute application software that has been licensed by GPLv3, they must provide a key provided by Apple to allow the uploading of modified versions of the software. iOS 7 is a mobile phone and tablet operating system developed by Apple in the United States. As the successor to iOS 6, the system was released at Apple's 2013 WWDC on June 10, 2013.

iOS 7 has been greatly improved on the basis of the previous generation iOS operating system. It not only adopts new application icons, but also redesigns the built-in applications, lock screen interface and notification center. iOS 7 also uses AirDrop as a way to share and improves multitasking capabilities. iOS 7 will support iPhone 4 and above, iPad 2 and above, iPad mini and iPod Touch 5 and above.

Apple pushed the latest iOS 7.0.4 system to iPhone, iPad and iPod touch on November 15, 2013. Apple said in the update log that this update is mainly used to fix the bug where FaceTime calls are invalid for some users, and also includes some other bug fixes and detail improvements. Improvements to iCloud Keychain are one of them. This feature comes from OS X Mavericks, and Apple is bringing it to mobile devices in iOS 7.0.3. iCloud Keychain helps users synchronize credit card data and website passwords saved on Safari.

Another improved feature is Spotlight search, with Apple adding support for Google and Wikipedia. When iOS 7 was officially launched in September 2013, Apple canceled Spotlight's support for Google and Wikipedia.

Apple also updated the old iOS 6 system at the same time. This update is mainly for fourth-generation iPod touch users. Like iOS 7.0.4, the system update with version number iOS 6.1.5 is also used to fix FaceTime calling bugs. In addition, previous generations of Apple TV have also received system updates.

On the morning of September 27, 2014, Apple stopped providing signatures for iOS 7.1.2 firmware on Friday. This means that users who have upgraded to the new version of iOS 8 will no longer be able to downgrade back to iOS 7.1.2. In the early morning of June 3rd, Beijing time, Apple’s annual Worldwide Developers Conference WWDC2014 kicked off at the Moscone Center in San Francisco, California, USA. There is no doubt that software system is the most important topic at the WWDC2014 Apple conference. At this conference, Apple officially announced the latest version of iOS system version iOS8. iOS8 continues the style of iOS7, but makes some local and detailed optimizations, improvements and improvements based on the original style, making it more pleasant.

First of all, the iOS8 notification center has a new design, canceling the "unread notifications" view, accessing more and richer data sources, and allowing you to directly reply to short messages in the notification center, and directly reply or delete them on the lock screen interface. Messages and iMessage audio content. Double-click the multitasking list of Home to see recent contacts. Click on the top of the card to directly reply to text messages and make calls.

The updates of Safari and Spotlight are basically consistent with the Mac's Yosemite system. Spotlight supports searching for all information, including applications, music, mail, news, restaurants, videos, etc. The deletion method of Mail emails has changed. Swipe left to delete, and swipe right to add labels and add them to the schedule. iOS8 also provides iCloudDrive network disk like Mac, and iCloudDrive supports direct use in any application, basically providing relevant function buttons and options.

The iOS keyboard has been improved, adding a function called Quicktype prediction prompt. This is the best improvement after the traditional keyboard becomes a touch keyboard. It can prompt you in advance what you are about to input, such as when a short When a message is sent asking the user to choose whether to go to dinner or watch a movie, the message will automatically appear with two options to choose between dinner and movie. Of course, automatic association input and self-learning are also more mature.

The new iMessage update adds the TaptoTalk voice messaging function, which is similar to WeChat. You can send voice messages or recordings directly through iMessage, and you can also send short video messages. The new iMessage supports group functions and supports the setting of group do not disturb. In addition, photo album sharing and geolocation functions are also provided in iMessage groups.

iOS8 adds the FamilySharing family sharing function, through which users can share location, photos, calendars, applications, music and videos, etc. with their family members. Parents can find the location of their children through FamilySharing, and the credit card in the main account can also choose whether to authorize it to other family members. The FamilySharing function limits one Apple ID to support up to 6 people, and the app does not need to be purchased again.

Healkit is one of the new flagship features of iOS8. As rumored, Healkit is equivalent to a system that can collect user health data. In Healkit, users can view various health and fitness-related information at any time, such as blood, heart rate, hydration, blood pressure, nutrition, blood sugar, sleep, respiratory rate, blood oxygen saturation, weight, etc. This information comes from sensors built into the iOS device as well as third-party health peripherals. HealthKit can serve as a storage center for each user's health data. Apple provides third-party application access to HealthKit, which can be provided to medical institutions when users need it.

The photo application of iOS8 has been greatly improved, especially photo management and the new SmartEditing editing function. Users can directly edit and beautify photos in the album with more editing and beautification options, such as modifying color and brightness. , exposure, contrast, color temperature, etc. Thanks to iCloud synchronization, multiple iOS devices can directly display photos from the same account and obtain the latest edited effects. As for iCloud synchronization space, Apple said that 5G is natively free, increasing to 20G only costs $1 per month, and 200G costs $4 per month.

Siri in the new iOS8 provides more intelligent and user-friendly services, not just the most basic functions. Users can directly say Hey, Siri! without pressing any buttons to call out Siri. It integrates more services provided by third parties, such as Shazam's music recognition, supports point-to-point navigation, new weather information and holiday information, etc.

What makes developers and users very excited is that iOS8 has opened up to 4,000 API interfaces. TouchID and camera APIs are officially open to developers. Even the keyboard input method that has been closed this time It is finally open, and developers can directly develop third-party input methods for iOS8.

In iOS 5, the main interface includes the following built-in applications: Messages, Calendar, Photos, YouTube, Stock Market, Maps (AGPS-assisted Google Maps), Weather, Time, Computer, Notes, System Settings, iTunes (will be Links to the iTunes Music Store and iTunes Radio Catalog), App Store, Game Center, and contact information. There are four commonly used applications at the bottom: Phone, Mail, Safari and iPod. (iPhone4S has built-in Siri)

In addition to phone calls and text messages, iPod Touch retains most of the apps that come with the iPhone. The iPod program on the iPhone is divided into two on the iPod Touch: Music and Video. The applications located on the dock at the bottom of the main interface have also been changed according to the main functions of iPod Touch: music, video, photos, iTunes, Game Center. The fourth-generation iPod Touch even has camera and video functions!

The iPad only retains some of the apps that come with the iPhone: Calendar, Contacts, Notes, Videos, YouTube, iTunes Store, App Store and Settings; the four commonly used apps at the bottom are: Safari, Mail, Photos and iPod UIView are the basis for users to build interfaces. All controls are drawn on this page. You can think of it as a canvas. You can add controls through UIView and use controls to interact with users. and transfer data.

Window and view are the most basic classes and are used to create any type of user interface. The window represents a geometric area on the screen, and the view class uses its own functions to draw different controls, such as the navigation bar and buttons, which are all attached to the view class, and a view is linked to a window. Views that display data UITextView: Present paragraphs of text to the user and allow the user to enter their own text using the keyboard.

UILabel: To implement short read-only text, you can choose the color, font and font size for the label by setting the view properties.

UIImageView: You can load pictures through UIImage and assign them to UIImageView. After loading, you can specify the display position and size.

UIWebView: Can provide display of other advanced web content such as HTML.PDF. Including xls, word and other documents, etc.

MKMapView: Maps can be embedded into applications through MKMapView. The very popular LBS application is based on this. You can also combine the MKAnnotationView and MKPinAnnotationView classes to customize the annotation information to annotate the map.

UIScrollView: Generally used to present content larger than the normal program window. All content can be viewed by scrolling horizontally and vertically, and zoom functionality is supported. Views that make selections UIAlertView: Let the user select or display text to the user through an alert view.

UIActionSheet: similar to UIAlertView, but can operate the form when there are many options. It provides a menu that scrolls up from the bottom of the screen.

(3) Others

UIButton: It is mainly the button that we usually touch. When triggered, we can call the method we want to execute.

UISegmentControl: Select button, you can set multiple selection items and trigger the corresponding items to call different methods.

UISwitch: switch button, you can choose to turn it on or off.

UISlideer: sliding button, commonly used to control volume, etc.

UITextField: Display text segment and display the given text.

UITableView: Table view, you can define the table view you want. The table header and table rows can be customized.

UIPickerView: Selection bar, generally used for date selection.

UISearchBar: Search bar, generally used for search functions.

UIToolBar: toolbar: generally used as a frame for the main page.

UIActivityIndicatorView: Progress bar, generally used to display download progress.

UIProgressView: Progress bar, generally used to display the download progress bar.

However, with the popularity and development of IPhone, the iPhone’s native interface controls cannot meet the growing functional needs of the product, which has become a big contradiction. iPhone encourages users to innovate, so more iPhone controls have emerged, allowing developers to apply existing technologies to the iPhone platform and create perfect desktop, WEB and mobile applications. Other IPhone-based controls, such as: ComponentOne Studio for iPhone, etc.