ios 加载gif图片内存暴增解决方法

在项目使用过程中，发现个别手机打开app直接崩溃，最后发现是因为加载动态启动图会内存暴增直接导致崩溃，我们使用的是SDWebImage。目前发现有两种解决办法。有需要的同学可以根据实际情况自行选择。

一、使用FLAnimatedImage可以解决，但是我遇到了一个问题，使用我们做的gif启动图片，会比实际动画时间慢一倍，从网上下载的gif图片是好的。使用这个的同学可以自行测试。

使用cocoaPod导入第三方
pod 'SDWebImage', '~>4.0.0'
pod 'FLAnimatedImage', '~> 1.0'
pod 'SDWebImage/GIF'

导入头文件
#import <FLAnimatedImageView+WebCache.h>

使用方法
NSURL *imgUrl = [[NSBundle mainBundle] URLForResource:@"1125x2436" withExtension:@"gif"];
    FLAnimatedImage *image = [FLAnimatedImage animatedImageWithGIFData:[NSData dataWithContentsOfURL:imgUrl]];
FLAnimatedImageView *imageView = [[FLAnimatedImageView alloc] initWithFrame:self.view.bounds];
    imageView.animatedImage = image;
 [self.view addSubview:imageView];

二、使用YYWebImage

使用cocoapod导入第三方
pod 'YYWebImage'

导入头文件
#import <YYWebImage/YYWebImage.h>

使用方法
UIImageView *imageview = [[YYAnimatedImageView alloc] initWithFrame:self.view.bounds];
imageview.yy_imageURL = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"1125x2436" ofType:@"gif"]];
[self.view addSubview:imageview];

还有另外一种就是不使用gif图片，使用视频播放（推荐使用）比较稳定

.h文件
#import <UIKit/UIKit.h>

#define SCREENH [UIScreen mainScreen].bounds.size.height
#define SCREEMW [UIScreen mainScreen].bounds.size.width
#define PlayFinishedNotify @"PlayFinishedNotify"

@interface AnimationViewController : UIViewController
@property (nonatomic, copy) void (^playFinished)();
@property (nonatomic, strong) NSString *moviePath;//视频路径
@end

.m文件
#import "AnimationViewController.h"
#import <MediaPlayer/MediaPlayer.h>
@interface AnimationViewController ()
@property (nonatomic, strong) MPMoviePlayerController *moviePlayer;
@end

@implementation AnimationViewController

- (void)setMoviePath:(NSString *)moviePath{
    _moviePath = [moviePath copy];
    // 停止之前的播放
    //    [self.moviePlayer stop];
    self.moviePlayer.view.backgroundColor = [UIColor clearColor];
    // 设置播放的路径
    self.moviePlayer.contentURL = [[NSURL alloc] initFileURLWithPath:moviePath];
    [self.moviePlayer prepareToPlay];

    [self.moviePlayer play];
}

-(MPMoviePlayerController *)moviePlayer{
    if (!_moviePlayer) {
        _moviePlayer = [[MPMoviePlayerController alloc]init];
        [_moviePlayer.view setFrame:self.view.bounds];
        //设置自动播放
        [_moviePlayer setShouldAutoplay:NO];
        _moviePlayer.scalingMode = MPMovieScalingModeAspectFill;
        //设置源类型 因为新特性一般都是播放本地的小视频 所以设置源类型为file
        _moviePlayer.movieSourceType = MPMovieSourceTypeUnknown;
        //取消控制视图 如：播放暂停等
        _moviePlayer.controlStyle = MPMovieControlStyleNone;
        [self.view addSubview:_moviePlayer.view];
        //监听播放完成
        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(playFinsihed) name:MPMoviePlayerPlaybackDidFinishNotification object:nil];
    }
    return _moviePlayer;
}
- (void)viewDidLoad {
    [super viewDidLoad];
//    UIImageView *imageView = [[UIImageView alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
//    imageView.image = [UIImage imageNamed:@"1242X2208_iphone6P"];
//    self.view = imageView;
}

- (void)playFinsihed{
    //添加进入按钮
//    UIButton *btn = [UIButton buttonWithType:UIButtonTypeSystem];
//    btn.frame = CGRectMake(0, SCREENH - 50, SCREEMW, 50);
//    [btn setTitle:@"进入" forState:UIControlStateNormal];
//    [btn addTarget:self action:@selector(btnclick) forControlEvents:UIControlEventTouchUpInside];
//    [self.moviePlayer.view addSubview:btn];
    self.playFinished();


    [[NSNotificationCenter defaultCenter]postNotificationName:PlayFinishedNotify object:nil];
}
- (void)btnclick{
    //btn点击事件 执行block
    self.playFinished();
}
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (void)dealloc
{
    [[NSNotificationCenter defaultCenter] removeObserver:self];
    NSLog(@"AnimationViewController-》释放");
}