Issue when creating CIImage from file
0
I get a nil no matter what I try to load a CIImage directly from file. However I can load the file into a UIImage and convert that to CIImage.
So, this works:
let testUIImage = UIImage(named: "image_0001.jpg")!
let testCIImage = CIImage(image: testUIImage) // OK
but this doesn't:
let testCIImage = CIImage(contentsOf: URL(string: "image_0001.jpg")!) // returns nil
What am I doing wrong? Is it the URL?
ios swift ciimage
edited Nov 21 '18 at 11:56
rptwsthi
8,52885292
asked Nov 21 '18 at 11:47
thebucc
285
add a comment |
0
I get a nil no matter what I try to load a CIImage directly from file. However I can load the file into a UIImage and convert that to CIImage.
So, this works:
let testUIImage = UIImage(named: "image_0001.jpg")!
let testCIImage = CIImage(image: testUIImage) // OK
but this doesn't:
let testCIImage = CIImage(contentsOf: URL(string: "image_0001.jpg")!) // returns nil
What am I doing wrong? Is it the URL?
ios swift ciimage
edited Nov 21 '18 at 11:56
rptwsthi
8,52885292
asked Nov 21 '18 at 11:47
thebucc
285
URL should convey the location of the image not the image name itself
– iOSer
Nov 21 '18 at 11:54
UIImage(named: "")is a shortcut for looking for images in the assets folder.URL(string: "image_0001.jpg")is not a valid URL and doesn't point to the same thing
– Scriptable
Nov 21 '18 at 11:54
add a comment |
0
0
0
I get a nil no matter what I try to load a CIImage directly from file. However I can load the file into a UIImage and convert that to CIImage.
So, this works:
let testUIImage = UIImage(named: "image_0001.jpg")!
let testCIImage = CIImage(image: testUIImage) // OK
but this doesn't:
let testCIImage = CIImage(contentsOf: URL(string: "image_0001.jpg")!) // returns nil
What am I doing wrong? Is it the URL?
ios swift ciimage
edited Nov 21 '18 at 11:56
rptwsthi
8,52885292
asked Nov 21 '18 at 11:47
thebucc
285
I get a nil no matter what I try to load a CIImage directly from file. However I can load the file into a UIImage and convert that to CIImage.
So, this works:
let testUIImage = UIImage(named: "image_0001.jpg")!
let testCIImage = CIImage(image: testUIImage) // OK
but this doesn't:
let testCIImage = CIImage(contentsOf: URL(string: "image_0001.jpg")!) // returns nil
What am I doing wrong? Is it the URL?
ios swift ciimage
ios swift ciimage
edited Nov 21 '18 at 11:56
rptwsthi
8,52885292
asked Nov 21 '18 at 11:47
thebucc
285
edited Nov 21 '18 at 11:56
rptwsthi
8,52885292
asked Nov 21 '18 at 11:47
thebucc
285
edited Nov 21 '18 at 11:56
rptwsthi
8,52885292
edited Nov 21 '18 at 11:56
rptwsthi
8,52885292
edited Nov 21 '18 at 11:56
rptwsthi
8,52885292
8,52885292
asked Nov 21 '18 at 11:47
thebucc
285
asked Nov 21 '18 at 11:47
thebucc
285
asked Nov 21 '18 at 11:47
thebucc
285
285
URL should convey the location of the image not the image name itself
– iOSer
Nov 21 '18 at 11:54
UIImage(named: "")is a shortcut for looking for images in the assets folder.URL(string: "image_0001.jpg")is not a valid URL and doesn't point to the same thing
– Scriptable
Nov 21 '18 at 11:54
add a comment |
URL should convey the location of the image not the image name itself
– iOSer
Nov 21 '18 at 11:54
UIImage(named: "")is a shortcut for looking for images in the assets folder.URL(string: "image_0001.jpg")is not a valid URL and doesn't point to the same thing
– Scriptable
Nov 21 '18 at 11:54
URL should convey the location of the image not the image name itself
– iOSer
Nov 21 '18 at 11:54
URL should convey the location of the image not the image name itself
– iOSer
Nov 21 '18 at 11:54
UIImage(named: "") is a shortcut for looking for images in the assets folder. URL(string: "image_0001.jpg") is not a valid URL and doesn't point to the same thing– Scriptable
Nov 21 '18 at 11:54
UIImage(named: "") is a shortcut for looking for images in the assets folder. URL(string: "image_0001.jpg") is not a valid URL and doesn't point to the same thing– Scriptable
Nov 21 '18 at 11:54
add a comment |
2 Answers
2
active
oldest
votes
0
UIImage(named: "name.ext")is a convenience initializer. It's a short form of
guard let url = Bundle.main.url(forResource:"name", withExtension:"ext"),
let data = try? Data(contentsOf: url),
let image = UIImage(data: data) else { return nil }
return image
URL(string:expects a string representing a full URL starting with a scheme for example
URL(string: "https://example.com/path/to/image_0001.jpg")
or
URL(string: "file:///Users/myuser/path/to/image_0001.jpg")
answered Nov 21 '18 at 12:10
vadian
143k13152169
thanks, your answer solves it. I was just giving the wrong URL. The image is in the file system, added to the project with "Location: Relative to group" (I just dragged & dropped from the file manager). To make the URL valid I not only had to add 'file:///", but also I had to enter the full absolute path: "file:///image_0001.jpg" didn't work, which to me is incomprehensible because UIImage(named: "image_0001.jpg") works.
– thebucc
Nov 22 '18 at 12:18
add a comment |
3
you need to give file url if your image inside main bundle then you can get url like below code
guard let url = Bundle.main.url(forResource:"image_0001", withExtension:"jpg") else {
return
}
let testCIImage = CIImage(contentsOf: url)
answered Nov 21 '18 at 12:14
Jatin Kathrotiya
389110
this one works too, thanks. I'd like to accept BOTH yours and @vadian's answers, because they are both correct but apparently I can't. I'm a noob for swift and frankly I didn't get your answer at first, but I immediately understood vadian's so he gets the tick.
– thebucc
Nov 22 '18 at 12:25
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
0
UIImage(named: "name.ext")is a convenience initializer. It's a short form of
guard let url = Bundle.main.url(forResource:"name", withExtension:"ext"),
let data = try? Data(contentsOf: url),
let image = UIImage(data: data) else { return nil }
return image
URL(string:expects a string representing a full URL starting with a scheme for example
URL(string: "https://example.com/path/to/image_0001.jpg")
or
URL(string: "file:///Users/myuser/path/to/image_0001.jpg")
answered Nov 21 '18 at 12:10
vadian
143k13152169
thanks, your answer solves it. I was just giving the wrong URL. The image is in the file system, added to the project with "Location: Relative to group" (I just dragged & dropped from the file manager). To make the URL valid I not only had to add 'file:///", but also I had to enter the full absolute path: "file:///image_0001.jpg" didn't work, which to me is incomprehensible because UIImage(named: "image_0001.jpg") works.
– thebucc
Nov 22 '18 at 12:18
add a comment |
0
UIImage(named: "name.ext")is a convenience initializer. It's a short form of
guard let url = Bundle.main.url(forResource:"name", withExtension:"ext"),
let data = try? Data(contentsOf: url),
let image = UIImage(data: data) else { return nil }
return image
URL(string:expects a string representing a full URL starting with a scheme for example
URL(string: "https://example.com/path/to/image_0001.jpg")
or
URL(string: "file:///Users/myuser/path/to/image_0001.jpg")
answered Nov 21 '18 at 12:10
vadian
143k13152169
thanks, your answer solves it. I was just giving the wrong URL. The image is in the file system, added to the project with "Location: Relative to group" (I just dragged & dropped from the file manager). To make the URL valid I not only had to add 'file:///", but also I had to enter the full absolute path: "file:///image_0001.jpg" didn't work, which to me is incomprehensible because UIImage(named: "image_0001.jpg") works.
– thebucc
Nov 22 '18 at 12:18
add a comment |
0
0
0
UIImage(named: "name.ext")is a convenience initializer. It's a short form of
guard let url = Bundle.main.url(forResource:"name", withExtension:"ext"),
let data = try? Data(contentsOf: url),
let image = UIImage(data: data) else { return nil }
return image
URL(string:expects a string representing a full URL starting with a scheme for example
URL(string: "https://example.com/path/to/image_0001.jpg")
or
URL(string: "file:///Users/myuser/path/to/image_0001.jpg")
answered Nov 21 '18 at 12:10
vadian
143k13152169
UIImage(named: "name.ext")is a convenience initializer. It's a short form of
guard let url = Bundle.main.url(forResource:"name", withExtension:"ext"),
let data = try? Data(contentsOf: url),
let image = UIImage(data: data) else { return nil }
return image
URL(string:expects a string representing a full URL starting with a scheme for example
URL(string: "https://example.com/path/to/image_0001.jpg")
or
URL(string: "file:///Users/myuser/path/to/image_0001.jpg")
answered Nov 21 '18 at 12:10
vadian
143k13152169
answered Nov 21 '18 at 12:10
vadian
143k13152169
answered Nov 21 '18 at 12:10
vadian
143k13152169
answered Nov 21 '18 at 12:10
vadian
143k13152169
143k13152169
thanks, your answer solves it. I was just giving the wrong URL. The image is in the file system, added to the project with "Location: Relative to group" (I just dragged & dropped from the file manager). To make the URL valid I not only had to add 'file:///", but also I had to enter the full absolute path: "file:///image_0001.jpg" didn't work, which to me is incomprehensible because UIImage(named: "image_0001.jpg") works.
– thebucc
Nov 22 '18 at 12:18
add a comment |
thanks, your answer solves it. I was just giving the wrong URL. The image is in the file system, added to the project with "Location: Relative to group" (I just dragged & dropped from the file manager). To make the URL valid I not only had to add 'file:///", but also I had to enter the full absolute path: "file:///image_0001.jpg" didn't work, which to me is incomprehensible because UIImage(named: "image_0001.jpg") works.
– thebucc
Nov 22 '18 at 12:18
thanks, your answer solves it. I was just giving the wrong URL. The image is in the file system, added to the project with "Location: Relative to group" (I just dragged & dropped from the file manager). To make the URL valid I not only had to add 'file:///", but also I had to enter the full absolute path: "file:///image_0001.jpg" didn't work, which to me is incomprehensible because UIImage(named: "image_0001.jpg") works.
– thebucc
Nov 22 '18 at 12:18
thanks, your answer solves it. I was just giving the wrong URL. The image is in the file system, added to the project with "Location: Relative to group" (I just dragged & dropped from the file manager). To make the URL valid I not only had to add 'file:///", but also I had to enter the full absolute path: "file:///image_0001.jpg" didn't work, which to me is incomprehensible because UIImage(named: "image_0001.jpg") works.
– thebucc
Nov 22 '18 at 12:18
add a comment |
3
you need to give file url if your image inside main bundle then you can get url like below code
guard let url = Bundle.main.url(forResource:"image_0001", withExtension:"jpg") else {
return
}
let testCIImage = CIImage(contentsOf: url)
answered Nov 21 '18 at 12:14
Jatin Kathrotiya
389110
this one works too, thanks. I'd like to accept BOTH yours and @vadian's answers, because they are both correct but apparently I can't. I'm a noob for swift and frankly I didn't get your answer at first, but I immediately understood vadian's so he gets the tick.
– thebucc
Nov 22 '18 at 12:25
add a comment |
3
you need to give file url if your image inside main bundle then you can get url like below code
guard let url = Bundle.main.url(forResource:"image_0001", withExtension:"jpg") else {
return
}
let testCIImage = CIImage(contentsOf: url)
answered Nov 21 '18 at 12:14
Jatin Kathrotiya
389110
this one works too, thanks. I'd like to accept BOTH yours and @vadian's answers, because they are both correct but apparently I can't. I'm a noob for swift and frankly I didn't get your answer at first, but I immediately understood vadian's so he gets the tick.
– thebucc
Nov 22 '18 at 12:25
add a comment |
3
3
3
you need to give file url if your image inside main bundle then you can get url like below code
guard let url = Bundle.main.url(forResource:"image_0001", withExtension:"jpg") else {
return
}
let testCIImage = CIImage(contentsOf: url)
answered Nov 21 '18 at 12:14
Jatin Kathrotiya
389110
you need to give file url if your image inside main bundle then you can get url like below code
guard let url = Bundle.main.url(forResource:"image_0001", withExtension:"jpg") else {
return
}
let testCIImage = CIImage(contentsOf: url)
answered Nov 21 '18 at 12:14
Jatin Kathrotiya
389110
answered Nov 21 '18 at 12:14
Jatin Kathrotiya
389110
answered Nov 21 '18 at 12:14
Jatin Kathrotiya
389110
answered Nov 21 '18 at 12:14
Jatin Kathrotiya
389110
389110
this one works too, thanks. I'd like to accept BOTH yours and @vadian's answers, because they are both correct but apparently I can't. I'm a noob for swift and frankly I didn't get your answer at first, but I immediately understood vadian's so he gets the tick.
– thebucc
Nov 22 '18 at 12:25
add a comment |
this one works too, thanks. I'd like to accept BOTH yours and @vadian's answers, because they are both correct but apparently I can't. I'm a noob for swift and frankly I didn't get your answer at first, but I immediately understood vadian's so he gets the tick.
– thebucc
Nov 22 '18 at 12:25
this one works too, thanks. I'd like to accept BOTH yours and @vadian's answers, because they are both correct but apparently I can't. I'm a noob for swift and frankly I didn't get your answer at first, but I immediately understood vadian's so he gets the tick.
– thebucc
Nov 22 '18 at 12:25
this one works too, thanks. I'd like to accept BOTH yours and @vadian's answers, because they are both correct but apparently I can't. I'm a noob for swift and frankly I didn't get your answer at first, but I immediately understood vadian's so he gets the tick.
– thebucc
Nov 22 '18 at 12:25
add a comment |
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URL should convey the location of the image not the image name itself
– iOSer
Nov 21 '18 at 11:54
UIImage(named: "")is a shortcut for looking for images in the assets folder.URL(string: "image_0001.jpg")is not a valid URL and doesn't point to the same thing– Scriptable
Nov 21 '18 at 11:54