退出并加载我的应用程序时，如何将图像保存并读取到临时文件夹 [英] How do I save and read an image to my temp folder when quitting and loading my app

问题描述

我希望在我的应用关闭后保存并读取我的临时文件夹的UIImage，然后在应用加载时加载并删除它。我该如何做到这一点。请帮助。

I want to save and read a UIImage to my temp folder when my app closes and then load and delete it when the app loads. How do I accomplish this. Please help.

推荐答案

这些方法允许您从iphone上的文档目录中保存和检索图像

These methods allow you to save and retrieve an image from the documents directory on the iphone

+ (void)saveImage:(UIImage *)image withName:(NSString *)name {
    NSData *data = UIImageJPEGRepresentation(image, 1.0);
    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSString *fullPath = [documentsDirectory stringByAppendingPathComponent:name];
    [fileManager createFileAtPath:fullPath contents:data attributes:nil];
}

+ (UIImage *)loadImage:(NSString *)name {
    NSString *fullPath = [documentsDirectory stringByAppendingPathComponent:name];    
    UIImage *img = [UIImage imageWithContentsOfFile:fullPath];

    return img;
}

这篇关于退出并加载我的应用程序时，如何将图像保存并读取到临时文件夹的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！