我想做一个应用程序,当按下按钮时,从当前主UIImageView保存图像。将其保存到相册。
我的程序所做的是在我按下保存到相册按钮后显示错误。可能我的代码结构不对。或者有人能告诉我正确的代码结构吗?
到目前为止,这是我的进展。
-(IBAction) saveToPhotoAlbum{
NSString *saveMyPhoto=[NSHomeDirectory() stringByAppendingPathComponent:@"image.png"];
UIImage *saved=[UIImage imageWithContentsOfFile:saveMyPhoto];
NSData *imageData = [NSData dataWithContentsOfFile:(NSString *)UIImagePNGRepresentation(saved)];
[imageData writeToFile:(NSString *)saved atomically:YES ];
UIImageWriteToSavedPhotosAlbum(saved, self, @selector(image:didFinishSavingWithError:contextInfo:), nil);
- (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo
{
UIAlertView *alert;
if (error)
alert = [[UIAlertView alloc] initWithTitle:@"Error"
message:@"Unable to save image to Photo Album."
delegate:self cancelButtonTitle:@"Ok"
otherButtonTitles:nil];
else
alert = [[UIAlertView alloc] initWithTitle:@"Success"
message:@"Image saved to Photo Album."
delegate:self cancelButtonTitle:@"Ok"
otherButtonTitles:nil];
[alert show];
[alert release];
}
答案 0 :(得分:0)
您应该提供保存图像的正确路径。一个也是读写的,请查看Documents目录NSString * docPath=[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"]
,然后使用相同的方法-stringByAppendingPathComponent添加文件名:或者只创建一个包含两个内容的格式化字符串