ios圖片緩衝播放

imageCache.h

//

//  ImageCache.h

//  nowLearn

//

//  Created by wang doublejie on 12-9-12.

//  Copyright (c) 2012年 __MyCompanyName__. All rights reserved.

//

//圖片緩衝類

#import <Foundation/Foundation.h>

@interface ImageCache : NSObject

{

    

}

+(UIImage*)loadImage:(NSString*)imageName;

+(void)releaseCache;

@end

imageCache.m

//

//  ImageCache.m

//  nowLearn

//

//  Created by wang doublejie on 12-9-12.

//  Copyright (c) 2012年 __MyCompanyName__. All rights reserved.

//

#import "ImageCache.h"

@implementation ImageCache

static  NSMutableDictionary *dict;

+(UIImage*)loadImage:(NSString *)imageName

{

    if(!dict)dict= [[NSMutableDictionary
dictionary] retain];

    UIImage* image= [dict
objectForKey:imageName];

    if (!image) {

        NSString* imagePath = [[NSBundle
mainBundle]pathForResource:imageName
ofType:nil];

        image = [UIImage imageWithContentsOfFile:imagePath];

        if (image) {

            [dict setObject:image
forKey:imageName];

            

        }

    }

    

   

    return image;

}

+(void)releaseCache

{

    if (dict) {

        [dict removeAllObjects];

    }

    

}

@end

//使用

- (void)viewDidLoad

{

    [super
viewDidLoad];

    NSMutableArray *images =[[NSMutableArray
alloc]initWithCapacity:30];

    for (int i=1; i<=9; i++) {

        NSString* imageName=[NSString
stringWithFormat:@"page_%d.jpg",i];

        UIImage *image=[ImageCache
loadImage:imageName];

        [images addObject:image];

        

    }

    imageView=[[UIImageView
alloc]initWithFrame:CGRectMake(0, 100, 320, 320)];

    imageView.animationImages=images;

    [images release];

    imageView.animationDuration=10;

    imageView.animationRepeatCount=100;

    [imageView startAnimating];

    [self.view
addSubview:imageView];

    

    UIButton *btn = [UIButton
buttonWithType:UIButtonTypeRoundedRect];

    btn.frame = CGRectMake(30, 420, 90, 35);

    

    [btn setTitle:@"清除記憶體佔用" forState:UIControlStateNormal];

    [btn setTitle:@"清除記憶體佔用" forState:UIControlStateHighlighted];

    [btn addTarget:self
action:@selector(clearMemory:)
forControlEvents:UIControlEventTouchUpInside];

    [self.view
addSubview:btn];

    

// Do any additional setup after loading the view.

}