iOS开发_加载Gif动态图
<h1 id="1加载gif">1、加载gif</h1><pre><code class="language-swift">NSString *full_path = @"/Users/sdr_mac/Desktop/1f914.gif"
NSData *image_data = ;
UIImage *gc_Image = [ initWithData:image_data];
self.image_v.image = gc_Image;
</code></pre>
<h1 id="2核心代码">2、核心代码</h1>
<ul>
<li>不需要 <strong>#import</strong> 类，直接将以下代码文件放到工程里面就行了。</li>
<li>
<h2 id="21-animatedgifimageserializationh">2.1 AnimatedGIFImageSerialization.h</h2>
</li>
</ul>
<pre><code class="language-swift">// AnimatedGIFImageSerialization.h
//
// Copyright (c) 2014 – 2019 Mattt (http://mat.tt/)
//
// 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.
@import Foundation;
#if defined(__IPHONE_OS_VERSION_MIN_REQUIRED)
@import UIKit;
NS_ASSUME_NONNULL_BEGIN
/**
*/
extern __attribute__((overloadable)) UIImage * _Nullable UIImageWithAnimatedGIFData(NSData *data);
/**
*/
extern __attribute__((overloadable)) UIImage * _Nullable UIImageWithAnimatedGIFData(NSData *data, CGFloat scale, NSTimeInterval duration, NSError * __autoreleasing *error);
#pragma mark -
/**
*/
extern __attribute__((overloadable)) NSData * _Nullable UIImageAnimatedGIFRepresentation(UIImage *image);
/**
*/
extern __attribute__((overloadable)) NSData * _Nullable UIImageAnimatedGIFRepresentation(UIImage *image, NSTimeInterval duration, NSUInteger loopCount, NSError * __autoreleasing *error);
#pragma mark -
/**
*/
@interface AnimatedGIFImageSerialization : NSObject
/// @name Creating an Animated GIF
/**
*/
+ (UIImage * _Nullable)imageWithData:(NSData *)data
error:(NSError * __autoreleasing *)error;
/**
*/
+ (UIImage * _Nullable)imageWithData:(NSData *)data
scale:(CGFloat)scale
duration:(NSTimeInterval)duration
error:(NSError * __autoreleasing *)error;
/// @name Creating Animated Gif Data
/**
*/
+ (NSData * _Nullable)animatedGIFDataWithImage:(UIImage *)image
error:(NSError * __autoreleasing *)error;
/**
*/
+ (NSData * _Nullable)animatedGIFDataWithImage:(UIImage *)image
duration:(NSTimeInterval)duration
loopCount:(NSUInteger)loopCount
error:(NSError * __autoreleasing *)error;
@end
/**
*/
extern NSString * const AnimatedGIFImageErrorDomain;
NS_ASSUME_NONNULL_END
#endif
</code></pre>
<ul>
<li>
<h2 id="22-animatedgifimageserializationm">2.2 AnimatedGIFImageSerialization.m</h2>
</li>
</ul>
<pre><code class="language-swift">// AnimatedGIFImageSerialization.m
//
// Copyright (c) 2014 – 2019 Mattt (http://mat.tt/)
//
// 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.
#import "AnimatedGIFImageSerialization.h"
@import ImageIO;
@import MobileCoreServices;
NS_ASSUME_NONNULL_BEGIN
typedef NS_ENUM(NSInteger, AnimatedGifScreenType) {
AnimatedGifScreenType480h = 480, // iPhone 1, 2, 3, 4, 4s
AnimatedGifScreenType568h = 568, // iPhone 5, iPhone 5s
AnimatedGifScreenType667h = 667, // iPhone 6
AnimatedGifScreenType736h = 736, // iPhone 6+
AnimatedGifScreenTypeUnknown = 0
};
static NSString * const AnimatedGifScreenTypeSuffix480h = @"";
static NSString * const AnimatedGifScreenTypeSuffix568h = @"-568h";
static NSString * const AnimatedGifScreenTypeSuffix667h = @"-667h";
static NSString * const AnimatedGifScreenTypeSuffix736h = @"-736h";
NSString * const AnimatedGIFImageErrorDomain = @"com.compuserve.gif.image.error";
__attribute__((overloadable)) UIImage * _Nullable UIImageWithAnimatedGIFData(NSData *data) {
return UIImageWithAnimatedGIFData(data, [ scale], 0.0, nil);
}
__attribute__((overloadable)) UIImage * _Nullable UIImageWithAnimatedGIFData(NSData *data, CGFloat scale, NSTimeInterval duration, NSError * __autoreleasing *error) {
if (!data) {
return nil;
}
NSMutableDictionary<NSString *, id> *mutableOptions = ;
mutableOptions[(__bridge NSString *)kCGImageSourceShouldCache] = @(YES);
mutableOptions[(__bridge NSString *)kCGImageSourceTypeIdentifierHint] = (__bridge NSString *)kUTTypeGIF;
CGImageSourceRef imageSource = CGImageSourceCreateWithData((__bridge CFDataRef)data, (__bridge CFDictionaryRef)mutableOptions);
size_t numberOfFrames = CGImageSourceGetCount(imageSource);
NSMutableArray<UIImage *> *mutableImages = ;
NSTimeInterval calculatedDuration = 0.0;
for (size_t idx = 0; idx < numberOfFrames; idx++) {
CGImageRef imageRef = CGImageSourceCreateImageAtIndex(imageSource, idx, (__bridge CFDictionaryRef)mutableOptions);
NSDictionary *properties = (__bridge_transfer NSDictionary *)CGImageSourceCopyPropertiesAtIndex(imageSource, idx, NULL);
NSDictionary *gifProperties = properties[(__bridge NSString *)kCGImagePropertyGIFDictionary];
NSNumber *delay = gifProperties[(__bridge NSString *)kCGImagePropertyGIFUnclampedDelayTime];
if (!delay) {
delay = gifProperties[(__bridge NSString *)kCGImagePropertyGIFDelayTime];
}
calculatedDuration += ;
];
CGImageRelease(imageRef);
}
CFRelease(imageSource);
if (numberOfFrames == 1) {
return ;
} else {
return ;
}
}
static BOOL AnimatedGifDataIsValid(NSData *data) {
if (data.length > 4) {
const unsigned char * bytes = ;
return bytes == 0x47 && bytes == 0x49 && bytes == 0x46;
}
return NO;
}
__attribute__((overloadable)) NSData * _Nullable UIImageAnimatedGIFRepresentation(UIImage *image) {
return UIImageAnimatedGIFRepresentation(image, 0.0, 0, nil);
}
__attribute__((overloadable)) NSData * _Nullable UIImageAnimatedGIFRepresentation(UIImage *image, NSTimeInterval duration, NSUInteger loopCount, NSError * __autoreleasing *error) {
if (!image) {
return nil;
}
NSArray<UIImage *> *images = image.images;
if (!images) {
images = @;
}
NSDictionary *userInfo = nil;
{
size_t frame_count = images.count;
NSTimeInterval frameDuration = (duration <= 0.0 ? image.duration / frame_count : duration / frame_count);
NSUInteger frameDelayCentiseconds = (NSUInteger)lrint(frameDuration * 100);
NSDictionary<NSString *, id> *frameProperties = @{
(__bridge NSString *)kCGImagePropertyGIFDictionary: @{
(__bridge NSString *)kCGImagePropertyGIFDelayTime: @(frameDelayCentiseconds)
}
};
NSMutableData *mutableData = ;
CGImageDestinationRef destination = CGImageDestinationCreateWithData((__bridge CFMutableDataRef)mutableData, kUTTypeGIF, frame_count, NULL);
NSDictionary<NSString *, id> *imageProperties = @{ (__bridge NSString *)kCGImagePropertyGIFDictionary: @{
(__bridge NSString *)kCGImagePropertyGIFLoopCount: @(loopCount)
}
};
CGImageDestinationSetProperties(destination, (__bridge CFDictionaryRef)imageProperties);
for (size_t idx = 0; idx < images.count; idx++) {
CGImageRef _Nullable cgimage = CGImage];
if (cgimage) {
CGImageDestinationAddImage(destination, (CGImageRef _Nonnull)cgimage, (__bridge CFDictionaryRef)frameProperties);
}
}
BOOL success = CGImageDestinationFinalize(destination);
CFRelease(destination);
if (!success) {
userInfo = @{
NSLocalizedDescriptionKey: NSLocalizedString(@"Could not finalize image destination", nil)
};
goto _error;
}
return ;
}
_error: {
if (error) {
*error = [ initWithDomain:AnimatedGIFImageErrorDomain code:-1 userInfo:userInfo];
}
return nil;
}
}
@implementation AnimatedGIFImageSerialization
+ (UIImage * _Nullable)imageWithData:(NSData *)data
error:(NSError * __autoreleasing *)error
{
return ;
}
+ (UIImage * _Nullable)imageWithData:(NSData *)data
scale:(CGFloat)scale
duration:(NSTimeInterval)duration
error:(NSError * __autoreleasing *)error
{
return UIImageWithAnimatedGIFData(data, scale, duration, error);
}
#pragma mark -
+ (NSData * _Nullable)animatedGIFDataWithImage:(UIImage *)image
error:(NSError * __autoreleasing *)error
{
return ;
}
+ (NSData * _Nullable)animatedGIFDataWithImage:(UIImage *)image
duration:(NSTimeInterval)duration
loopCount:(NSUInteger)loopCount
error:(NSError *__autoreleasing *)error
{
return UIImageAnimatedGIFRepresentation(image, duration, loopCount, error);
}
@end
NS_ASSUME_NONNULL_END
#pragma mark -
#ifndef ANIMATED_GIF_NO_UIIMAGE_INITIALIZER_SWIZZLING
@import ObjectiveC.runtime;
static inline void animated_gif_swizzleSelector(Class class, SEL originalSelector, SEL swizzledSelector) {
Method originalMethod = class_getInstanceMethod(class, originalSelector);
Method swizzledMethod = class_getInstanceMethod(class, swizzledSelector);
if (class_addMethod(class, originalSelector, method_getImplementation(swizzledMethod), method_getTypeEncoding(swizzledMethod))) {
class_replaceMethod(class, swizzledSelector, method_getImplementation(originalMethod), method_getTypeEncoding(originalMethod));
} else {
method_exchangeImplementations(originalMethod, swizzledMethod);
}
}
@interface UIImage (_AnimatedGIFImageSerialization)
@end
@implementation UIImage (_AnimatedGIFImageSerialization)
+ (void)load {
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
@autoreleasepool {
animated_gif_swizzleSelector(object_getClass((id)self), @selector(imageNamed:), @selector(animated_gif_imageNamed:));
animated_gif_swizzleSelector(object_getClass((id)self), @selector(imageWithData:), @selector(animated_gif_imageWithData:));
animated_gif_swizzleSelector(object_getClass((id)self), @selector(imageWithData:scale:), @selector(animated_gif_imageWithData:scale:));
animated_gif_swizzleSelector(object_getClass((id)self), @selector(imageWithContentsOfFile:), @selector(animated_gif_imageWithContentsOfFile:));
animated_gif_swizzleSelector(self, @selector(initWithContentsOfFile:), @selector(animated_gif_initWithContentsOfFile:));
animated_gif_swizzleSelector(self, @selector(initWithData:), @selector(animated_gif_initWithData:));
animated_gif_swizzleSelector(self, @selector(initWithData:scale:), @selector(animated_gif_initWithData:scale:));
}
});
}
#pragma mark -
NS_ASSUME_NONNULL_BEGIN
+ (UIImage * _Nullable)animated_gif_imageNamed:(NSString *)name __attribute__((objc_method_family(new))) {
CGFloat scale = [ scale];
CGRect screenBounds = [ bounds];
NSString *ratioSuffix = @"";
switch ((NSUInteger)screenBounds.size.height) {
case AnimatedGifScreenType480h:
ratioSuffix = AnimatedGifScreenTypeSuffix480h;
break;
case AnimatedGifScreenType568h:
ratioSuffix = AnimatedGifScreenTypeSuffix568h;
break;
case AnimatedGifScreenType667h:
ratioSuffix = AnimatedGifScreenTypeSuffix667h;
break;
case AnimatedGifScreenType736h:
ratioSuffix = AnimatedGifScreenTypeSuffix736h;
break;
}
NSString *scaleSuffix = @"";
if (scale >= 3) {
scaleSuffix = @"@3x";
} else if (scale >= 2) {
scaleSuffix = @"@2x";
}
NSString * _Nullable path = nil;
if (!path) {
// e.g. animated-568h@2x.gif
NSString *nameWithRatioAndScale = [[ stringByAppendingString:ratioSuffix] stringByAppendingString:scaleSuffix];
path = [ pathForResource:nameWithRatioAndScale ofType:];
}
if (!path) {
// e.g. animated@2x.gif
NSString *nameWithRatio = [[ stringByAppendingString:scaleSuffix] stringByAppendingPathExtension:];
path = [ pathForResource:nameWithRatio ofType:];
}
if (!path) {
// e.g. animated.gif
path = [ pathForResource: ofType:];
}
if (path) {
NSData *data = ;
if (AnimatedGifDataIsValid(data)) {
return UIImageWithAnimatedGIFData(data);
}
}
return ;
}
+ (UIImage * _Nullable)animated_gif_imageWithContentsOfFile:(NSString *)path {
if (path) {
NSData *data = ;
if (AnimatedGifDataIsValid(data)) {
if ([ hasSuffix:@"@3x"]) {
return UIImageWithAnimatedGIFData(data, 3.0, 0.0, nil);
} else if ([ hasSuffix:@"@2x"]) {
return UIImageWithAnimatedGIFData(data, 2.0, 0.0, nil);
} else {
return UIImageWithAnimatedGIFData(data);
}
}
}
return ;
}
+ (UIImage * _Nullable)animated_gif_imageWithData:(NSData *)data {
if (AnimatedGifDataIsValid(data)) {
return UIImageWithAnimatedGIFData(data);
}
return ;
}
+ (UIImage * _Nullable)animated_gif_imageWithData:(NSData *)data
scale:(CGFloat)scale {
if (AnimatedGifDataIsValid(data)) {
return UIImageWithAnimatedGIFData(data, scale, 0.0, nil);
}
return ;
}
#pragma mark -
- (instancetype)animated_gif_initWithContentsOfFile:(NSString *)path __attribute__((objc_method_family(init))) {
NSData *data = ;
if (AnimatedGifDataIsValid(data)) {
if ([ hasSuffix:@"@3x"]) {
return UIImageWithAnimatedGIFData(data, 3.0, 0.0, nil);
} else if ([ hasSuffix:@"@2x"]) {
return UIImageWithAnimatedGIFData(data, 2.0, 0.0, nil);
} else {
return UIImageWithAnimatedGIFData(data);
}
}
return ;
}
- (instancetype)animated_gif_initWithData:(NSData *)data __attribute__((objc_method_family(init))) {
if (AnimatedGifDataIsValid(data)) {
return UIImageWithAnimatedGIFData(data);
}
return ;
}
- (instancetype)animated_gif_initWithData:(NSData *)data
scale:(CGFloat)scale __attribute__((objc_method_family(init)))
{
if (AnimatedGifDataIsValid(data)) {
return UIImageWithAnimatedGIFData(data, scale, 0.0, nil);
}
return ;
}
@end
NS_ASSUME_NONNULL_END
#endif
</code></pre>
</div>
<div id="MySignature" role="contentinfo">
<hr>
<br>
<div>作者： CH520</div>
<div>出处： 博客园资源分享中心</div><br><br>
来源：https://www.cnblogs.com/CH520/p/13781389.html
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