f2cf74c7
 yangbin
1.0.20(4)
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//
// ImageTransition.swift
// Kingfisher
//
// Created by Wei Wang on 15/9/18.
//
// Copyright (c) 2018 Wei Wang <onevcat@gmail.com>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
#if os(macOS)
// Not implemented for macOS and watchOS yet.
import AppKit
/// Image transition is not supported on macOS.
public enum ImageTransition {
case none
var duration: TimeInterval {
return 0
}
}
#elseif os(watchOS)
import UIKit
/// Image transition is not supported on watchOS.
public enum ImageTransition {
case none
var duration: TimeInterval {
return 0
}
}
#else
import UIKit
/**
Transition effect which will be used when an image downloaded and set by `UIImageView` extension API in Kingfisher.
You can assign an enum value with transition duration as an item in `KingfisherOptionsInfo`
to enable the animation transition.
Apple's UIViewAnimationOptions is used under the hood.
For custom transition, you should specified your own transition options, animations and
completion handler as well.
*/
public enum ImageTransition {
/// No animation transition.
case none
/// Fade in the loaded image.
case fade(TimeInterval)
/// Flip from left transition.
case flipFromLeft(TimeInterval)
/// Flip from right transition.
case flipFromRight(TimeInterval)
/// Flip from top transition.
case flipFromTop(TimeInterval)
/// Flip from bottom transition.
case flipFromBottom(TimeInterval)
/// Custom transition.
case custom(duration: TimeInterval,
options: UIView.AnimationOptions,
animations: ((UIImageView, UIImage) -> Void)?,
completion: ((Bool) -> Void)?)
var duration: TimeInterval {
switch self {
case .none: return 0
case .fade(let duration): return duration
case .flipFromLeft(let duration): return duration
case .flipFromRight(let duration): return duration
case .flipFromTop(let duration): return duration
case .flipFromBottom(let duration): return duration
case .custom(let duration, _, _, _): return duration
}
}
var animationOptions: UIView.AnimationOptions {
switch self {
case .none: return []
case .fade(_): return .transitionCrossDissolve
case .flipFromLeft(_): return .transitionFlipFromLeft
case .flipFromRight(_): return .transitionFlipFromRight
case .flipFromTop(_): return .transitionFlipFromTop
case .flipFromBottom(_): return .transitionFlipFromBottom
case .custom(_, let options, _, _): return options
}
}
var animations: ((UIImageView, UIImage) -> Void)? {
switch self {
case .custom(_, _, let animations, _): return animations
default: return { $0.image = $1 }
}
}
var completion: ((Bool) -> Void)? {
switch self {
case .custom(_, _, _, let completion): return completion
default: return nil
}
}
}
#endif
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