iOS实现图片存在本地、再从本地获取图片的功能
iOS实现图片存在本地、再从本地获取图片的功能,代码如下:
//将图片保存到本地 + (void)SaveImageToLocal:(UIImage*)image Keys:(NSString*)key { NSUserDefaults* preferences = [NSUserDefaults standardUserDefaults]; //[preferences persistentDomainForName:LocalPath]; [preferences setObject:UIImagePNGRepresentation(image) forKey:key]; } //本地是否有相关图片 + (BOOL)LocalHaveImage:(NSString*)key { NSUserDefaults* preferences = [NSUserDefaults standardUserDefaults]; //[preferences persistentDomainForName:LocalPath]; NSData* imageData = [preferences objectForKey:key]; if (imageData) { return YES; } return NO; } //从本地获取图片 + (UIImage*)GetImageFromLocal:(NSString*)key { NSUserDefaults* preferences = [NSUserDefaults standardUserDefaults]; //[preferences persistentDomainForName:LocalPath]; NSData* imageData = [preferences objectForKey:key]; UIImage* image; if (imageData) { image = [UIImage imageWithData:imageData]; } else { NSLog(@"未从本地获得图片"); } return image; }
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