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ImageScout

(★ 970)

A Swift implementation of fastimage. Supports PNG, GIF, and JPEG.

파일 탐색기

최종 버전 다운로드 (.zip)

- - test.yml
- - AppDelegate.swift
  - Info.plist
  - ViewController.swift
- - AppDelegate.swift
  - Info.plist
  - ViewController.swift
- - project.pbxproj
- - contents.xcworkspacedata
- - contents.xcworkspacedata
- project.pbxproj
- - IDEWorkspaceChecks.plist
- contents.xcworkspacedata
- - ImageParser.swift
  - ImageScout.swift
  - ScoutOperation.swift
  - SessionDelegate.swift
- - ScoutTests.swift
- - scout.bmp
  - scout.gif
  - scout.jpg
  - scout.png
- Info.plist
.gitignore
.swift-version
ImageScout.podspec
Info.plist
LICENSE
Logo.png
Makefile
Package.swift
README.md

# 설치 가이드

1. 코드 내려받기

git clone https://github.com/kaishin/ImageScout

깃허브에서 프로젝트 코드 전체를 내 컴퓨터로 내려받습니다.

cd ImageScout

방금 내려받은 프로젝트 폴더 안으로 이동합니다.

2. Make

보통 추천

사전 준비물

Git GitHub에서 프로젝트 코드를 내려받으려면 필요합니다.
Make Linux/macOS는 보통 기본 설치되어 있습니다. Windows는 별도 설치(예: MSYS2, WSL)가 필요합니다.

make

생성된 빌드 설정을 바탕으로 실제 컴파일을 진행해 실행 파일을 만듭니다.

✅ 에러 없이 끝나면 성공입니다. 생성된 실행 파일을 직접 실행해보세요.

// repository documentation

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<img src="https://github.com/kaishin/ImageScout/blob/swift4/Logo.png?raw=true" alt="Logo" width="200">

# ImageScout

![Test](https://github.com/kaishin/ImageScout/workflows/Test/badge.svg)
[![GitHub release](https://img.shields.io/github/release/kaishin/ImageScout.svg)](https://github.com/kaishin/ImageScout/releases/latest) 
![Swift 5.0](https://img.shields.io/badge/Swift-5.0-orange.svg) ![platforms](https://img.shields.io/badge/platforms-iOS%20%7C%20macOS-lightgrey.svg)

**ImageScout** is a Swift implementation of [fastimage](https://pypi.python.org/pypi/fastimage/0.2.1).
It allows you to find the size and type of a remote image by downloading as little as possible.

#### Why?

Sometimes you need to know the size of a remote image before downloading it, such as
using a custom layout in a `UICollectionView`.

#### How?

ImageScout parses the image data as it is downloaded. As soon as it finds out the size and type of image,
it stops the download. The downloaded data is below 60 KB in most cases.

#### Install

#### Swift Package Manager

Add the following to your `Package.switft` file:

```swift
let package = Package(
    dependencies: [
    .package(url: "https://github.com/kaishin/ImageScout.git", from: "2.1.0")
    ],
)
```
#### [Carthage](https://github.com/Carthage/Carthage)

- Add the following to your Cartfile: `github "kaishin/ImageScout"`
- Then run `carthage update`
- Follow the current instructions in [Carthage's README][carthage-installation]
for up to date installation instructions.

[carthage-installation]: https://github.com/Carthage/Carthage#adding-frameworks-to-an-application

#### [CocoaPods](http://cocoapods.org)

- Add the following to your [Podfile](http://guides.cocoapods.org/using/the-podfile.html): `pod 'ImageScout'`
- You will also need to make sure you're opting into using frameworks: `use_frameworks!`
- Then run `pod install` with CocoaPods 1.0 or newer.

#### Usage

The only method you will be using is `scoutImageWithURI()`, with the following full signature:

```swift
func scoutImageWithURI(URI: String, completion: (NSError?, CGSize, ScoutedImageType) -> ())
```

Here's an example:

```swift
let scout = ImageScout()

scout.scoutImageWithURI("http://.../image-scout-logo.png") { error, size, type in
  if let error = error {
    print(error.code)
  } else {
    print("Size: \(size)")
    print("Type: \(type.rawValue)")
  }
}
```

If the image is not successfully parsed, the size is going to be `CGSizeZero` and the type `.Unsupported`. The error will contain more info about the reason:

- Error code **100**: Invalid URI parameter.
- Error code **101**: Image is corrupt or malformatted.
- Error code **102**: Not an image or unsopported image format URL.

⚠️ *It's important to keep a strong reference to the `ImageScout` instance until the callback completes. If reference is lost, your completion handler will never be executed.*

#### Compatibility

- Swift 5 / Xcode 11
- iOS 8+
- macOS 10.11

#### License

See LICENSE.