ios开发调用gif动态图
//
// ViewController.m
// demoLaoyang
//
// Created by dongqiangfei on 16/7/18.
// Copyright © 2016年 dongqiangfei. All rights reserved.
//
#import "ViewController.h"
#import <ImageIO/ImageIO.h>
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
NSString *name = @"loading.gif";
NSString *filePath = [[NSBundle bundleWithPath:[[NSBundle mainBundle] bundlePath]] pathForResource:name ofType:nil];
NSData *imageData = [NSData dataWithContentsOfFile:filePath];
UIImageView *loadingImageView = [[UIImageView alloc] init];
loadingImageView.backgroundColor = [UIColor clearColor];
loadingImageView.image = [self gifChangeToImageWithData:imageData];
loadingImageView.frame = CGRectMake(0, 0, 124, 124);
[self configUI:loadingImageView];
// Do any additional setup after loading the view, typically from a nib.
}
- (UIImage *)gifChangeToImageWithData:(NSData *)data
{
if (!data)
{
return nil;
}
CGImageSourceRef source = CGImageSourceCreateWithData((__bridge CFDataRef)data, NULL);
size_t count = CGImageSourceGetCount(source);
UIImage *animatedImage;
if (count <= 1)
{
animatedImage = [[UIImage alloc] initWithData:data];
}
else
{
NSMutableArray *images = [NSMutableArray array];
NSTimeInterval duration = 3.0f;
for (size_t i = 0; i < count; i++)
{
CGImageRef image = CGImageSourceCreateImageAtIndex(source, i, NULL);
if (!image)
{
continue;
}
duration += [self frameDurationAtIndex:i source:source];
[images addObject:[UIImage imageWithCGImage:image scale:[UIScreen mainScreen].scale orientation:UIImageOrientationUp]];
CGImageRelease(image);
}
if (!duration)
{
duration = (1.0f / 10.0f) * count;
}
animatedImage = [UIImage animatedImageWithImages:images duration:duration];
}
CFRelease(source);
return animatedImage;
}
- (void)configUI:(UIImageView *)loadingImageView
{
loadingImageView.center = CGPointMake(400 / 2, 400 / 2);
loadingImageView.tag = 0xadd;
[self.view addSubview:loadingImageView];
}
- (float)frameDurationAtIndex:(NSUInteger)index source:(CGImageSourceRef)source
{
float frameDuration = 0.1f;
CFDictionaryRef cfFrameProperties = CGImageSourceCopyPropertiesAtIndex(source, index, nil);
NSDictionary *frameProperties = (__bridge NSDictionary *)cfFrameProperties;
NSDictionary *gifProperties = frameProperties[(NSString *)kCGImagePropertyGIFDictionary];
NSNumber *delayTimeUnclampedProp = gifProperties[(NSString *)kCGImagePropertyGIFUnclampedDelayTime];
if (delayTimeUnclampedProp)
{
frameDuration = [delayTimeUnclampedProp floatValue];
}
else
{
NSNumber *delayTimeProp = gifProperties[(NSString *)kCGImagePropertyGIFDelayTime];
if (delayTimeProp)
{
frameDuration = [delayTimeProp floatValue];
}
}
if (frameDuration < 0.011f)
{
frameDuration = 0.100f;
}
CFRelease(cfFrameProperties);
return frameDuration;
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
