ios 将图像保存到 Documents 目录并检索电子邮件附件
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Saving image to Documents directory and retrieving for email attachment
提问by Michael Robinson
I having trouble figuring out NSBundle& DocumentDirectory data, I have a Camera Picture "imageView" that I'm saving to the NSDocumentDirectoyand then want to retrieve it for attaching to an email,
我无法找出NSBundle& DocumentDirectory 数据，我有一个相机图片“ imageView”，我正在保存它NSDocumentDirectoy，然后想要检索它以附加到电子邮件中，
Here the saving code:
这里的保存代码：
- (IBAction)saveImage {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *savedImagePath = [documentsDirectory stringByAppendingPathComponent:@"savedImage.png"];
UIImage *image = imageView.image; // imageView is my image from camera
NSData *imageData = UIImagePNGRepresentation(image);
[imageData writeToFile:savedImagePath atomically:NO];
}
Here is the new getting data code:
这是新的获取数据代码：
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *appFile = [documentsDirectory stringByAppendingPathComponent:@"savedImage.png"];
NSData *myData = [[[NSData alloc] initWithContentsOfFile:appFile] autorelease];
[picker addAttachmentData:myData mimeType:@"image/png" fileName:@"savedImage"];
采纳答案by Jordan
- (IBAction)getImage {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *getImagePath = [documentsDirectory stringByAppendingPathComponent:@"savedImage.png"];
UIImage *img = [UIImage imageWithContentsOfFile:getImagePath];
}
This should get you started!
这应该让你开始！
回答by Suragch
Swift 3
斯威夫特 3
// Create a URL
let documentsURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first
let imageURL = documentsURL?.appendingPathComponent("MyImageName.png")
// save image to URL
let myImage = imageView.image! // or wherever you have your UIImage
do {
try UIImagePNGRepresentation(myImage)?.write(to: imageURL!)
} catch {}
// Use the URL to retrieve the image for sharing to email, social media, etc.
// docController.URL = imageURL
// ...
I force unwrapped some of the optionals for brevity. Use guardor if letin your code.
为简洁起见，我强制展开了一些可选选项。在您的代码中使用guard或if let。
回答by S R Nayak
Try this one :
试试这个：
-(void)setProfilePic
{
NSArray *docpaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [docpaths objectAtIndex:0];
NSString *imagePath = [documentsDirectory stringByAppendingPathComponent:@"Image.png"];
NSData *imgData = [[NSData alloc] initWithContentsOfURL:[NSURL fileURLWithPath:imagePath]];
UIImage *thumbNail = [[UIImage alloc] initWithData:imgData];
[profilePic_btn setBackgroundImage:thumbNail forState:UIControlStateNormal];
}
回答by Ben Gotow
Because each iPhone app is in it's own sandbox, you don't have access to a device-wide documents folder. To attach an image to an email, save the image in your own documents folder. Try using [@"~/Documents" StringByExpandingTildeInPath]to get your local documents folder - that works for me. It looks like the technique you're using for attaching the image to an email is correct.
因为每个 iPhone 应用程序都在它自己的沙箱中，所以您无权访问设备范围的文档文件夹。要将图像附加到电子邮件，请将图像保存在您自己的文档文件夹中。尝试使用[@"~/Documents" StringByExpandingTildeInPath]来获取您的本地文档文件夹 - 这对我有用。看起来您用于将图像附加到电子邮件的技术是正确的。
Hope that helps,
希望有所帮助，
