App Development Exam > App Development Videos > Swift in Xcode: The Complete iOS Development Guide > Moving Objects Selectively! (SpriteKit/Swift in Xcode)
Moving Objects Selectively! (SpriteKit/Swift in Xcode) Video Lecture | Swift in Xcode: The Complete iOS Development Guide - App Development
FAQs on Moving Objects Selectively! (SpriteKit/Swift in Xcode) Video Lecture - Swift in Xcode: The Complete iOS Development Guide - App Development
| 1. What is SpriteKit and how does it relate to app development? |  |
Ans. SpriteKit is a framework provided by Apple for building 2D games and interactive animations. It is commonly used in app development to create engaging and visually appealing user interfaces.
| 2. How can I selectively move objects in SpriteKit using Swift in Xcode? | |
Ans. To selectively move objects in SpriteKit, you can use the SKAction class along with the runAction(_:completion:) method. By creating custom SKAction objects, you can specify the desired movement behavior for individual objects.
| 3. Can I move multiple objects simultaneously in SpriteKit? | |
Ans. Yes, you can move multiple objects simultaneously in SpriteKit by running SKAction sequences or groups. By grouping multiple SKAction objects together, you can apply the same movement or animation to multiple objects at once.
| 4. Are there any limitations to moving objects selectively in SpriteKit? | |
Ans. While SpriteKit provides powerful tools for moving objects selectively, it's important to note that the complexity and number of objects being moved can impact performance. It is recommended to optimize your code and consider using techniques like object pooling to handle a large number of moving objects efficiently.
| 5. How can I control the speed and duration of object movement in SpriteKit? | |
Ans. In SpriteKit, you can control the speed and duration of object movement by adjusting the properties of the SKAction objects. For example, you can use the duration property to specify the desired duration of the movement, and the timingMode property to control the speed and easing of the movement.
Text Transcript from Video
hey what's going on everybody today I'm
going to show you how to selectively
move objects with Swift and Xcode using
sprite kit and also not and spring kit
so let's go ahead and get started all
right so first thing we need to do is
head over to Xcode and create a new
Xcode project now this time around it
will be a sprite kick game so click game
and then our product name I'm just going
to call mine touches too as I already
have a previous project language will be
set to swift and game technology will be
sprite kit and devices will be set to
iPhone click Next and create and let's
make this a bit bigger and let's head
right into our game scene swift and
inside of our game scene dev swift
richer is going to delete the label that
we have right up here so delete that and
then we also have this sprite down here
I'm going to keep everything about the
spray except the action that you see
right here and then I'm going to take
this sprite and move this right outside
of the did move to view right above it
just so that it's a public sprite and we
will be April to reference this in
different functions now we can take the
rest of the sprite code and we're going
to put this right into our did move to
view now inside of our did move to view
we have the sprite X scale equals 0.5
sprite dot y scale equals 0.5 sprite dot
position is equal to location which is
no longer valid so we need to change
this equal to CG point and we're going
to make the x value equal to frame dot
width divided by 2 this will put it
right in the middle of the scene and
then our Y value will be equal to frame
dot height divided by 2 as well this
again puts it right in the middle of the
scene now instead of our touches began
we want to make our sprite equal to the
position that we touched so it
automatically creates this for us in
this for touch in touches as a set of UI
touches and the location will be equal
to the touch dot location in node
meaning the location will be equal to
exactly where you touched on the screen
now we need to go down here and we're
going to say if our sprite dot contains
point location so or if it contains the
points inside of the sprite meaning that
we touch the sprite then we want to make
the sprite dot position equal to
location
and now if we were to build and run this
you will see that we have our spaceship
right here and we can click and it'll
move over to that scene but as you can
see I can't click and drag the spaceship
to where I want it to be it's basically
just presenting its center position
equal to that of my mouse or where I
touched so let's head back over to our
game scene dot Swift and inside of this
we need to go right outside of the
touches began and say touches moved so
when the touches are moved we want to do
exactly the same thing we just basically
want to move the sprite position equal
to our location so I'm basically just
copying and pasting all of this for
touch and touches and so on and so forth
and I'm pasting that right into touches
moved and now if we were to build and
run now I can click and drag this
spaceship around and also you'll notice
that I can touch outside of the
spaceship and it won't do anything but
as soon as I touch on the spaceship it
will move and lastly I'm just going to
show you how to do something when the
touches are ended so just say touches
ended and we're going to set the sprite
position equal to half the scene again
so I'm just going to say sprite def
position is equal to CG point X
basically what we set it up in the first
place
now it's build and run this now I can
click and drag this spaceship around and
as soon as I let go it moves back to the
original position and if you have a
second spaceship or sprite that you're
trying to move we need to go up here and
I'm just going to copy and paste this
let's pry equal eske sprite node and I'm
going to name this let sprite two equal
s K sprite note image name spaceship and
then I'm again just going to copy and
paste pretty much everything that you
see right here and paste that right
afterwards and we need to change
anything that's a sprite equal to sprite
two like so and now we have our sprite
two on our scene but I do want to make
it off the scene a little bit so I don't
have them overlapping so I'm going to
make so I'm going to set the Y value
equal to frame height divided by four
and we'll do the same with the x
position and we'll make it divided by
four just so we can differentiate
between the two different spaceships and
now inside of our touches began we just
need to say else if our sprite 2 dot
contains point and this will be again
the location
then we want to move so we can say
sprite to dot position will be equal to
location inside of this and also we need
to do the touches moved so let's just
copy and paste that line of code right
into our touches moved and we can also
do the same with our down here where we
want it to return to the original
position so we can say a sprite two dot
position I'm just going to move up here
to my did move to view and copy and
paste this line of code that you see
right here and paste that right down
here and my touches ended now let's
build and run and now we have this
spaceship right over here this is our
sprite two and as you will see that's a
bit off the scene but it works but one
thing you'll notice is that I can click
and drag this right and as soon as I hit
the other sprite it overrides whatever I
had before and now we're going to do
this the non sprite gateway so let's go
ahead open up Xcode create a new Xcode
project and this will be a single view
application our product name I'm just
going to call mine touches three our
language will be set to Swift and our
devices will be set to iPhone click Next
and create now let's make this a bit
bigger and we're just gonna head right
into our main dot storyboard now inside
of our main dot storyboard I'm just
going to click and drag a uiimageview
onto our seam and I'm going to shrink it
down to whatever size I want put it
right over there and I'm going to change
the background color just so it's
visible to us and now we need to open up
the assistant editor and instead of our
assistant editor should be our view
controller dot Swift so inside of our
view controller dot so if we want to
right-click or control click and drag
from our UI image view over to our view
controller dot Swift we're gonna make
the connection type an outlet and the
name of this outlet will just be our
image connect and now down here we need
to create a new function called touches
began quite surprising and inside of our
touches began we're actually going to
borrow from our sprite kit project that
I just worked on and so let's head back
over to our sprite kit project and I
just take this for and let statement
that you have right here and let's paste
that right
inside of her touches began and there's
a few things we need to change this
should not be touched out location and
note this should be touch dot location
in view and this will be our self dot
view like so and inside of this for
statement we're going to test our image
to see whether it's being touched or not
so we're going to say if the image dot
frame dot contains and we're going to
see if it contains the point of our
location that we have right here and
after that we needed an open curly
bracket enter and close curly bracket
now inside of this if statement we need
to say image dots Center will be equal
to our location like so so now that's
pretty much all the lines of code we
need to move this image next thing we
need to do is have a touches moved like
so and we're just gonna copy and paste
all of this code that we have inside of
our touches began paste that right in
there and if you want to have a touches
ended we can so let's just say touches
ended and we're going to say image dot
Center will be equal to ourself down to
view dot Center like so and now if we
were to build and run this you will see
that we have our big blue you will see
that we have our big blue block right
here and I can click and drag that
around and if I click anywhere else
nothing happens but as soon as I start
clicking on it something happens so as
you can see there's a difference between
sprite kits and the non sprite kit way
of doing things now if you want to add a
second image we can add that image right
in here and we can click right click or
control click and drag from the CM at
uiimageview and create this image like
so we're going to call this image to
connect and inside of our touches began
we need to do pretty much do the exact
same thing we need to say if our image
to frame dot contains point and this
will be location then if we want to move
our image to and we can change the
position of our image to chest by easily
saying image to dot Center will be equal
to location and now we can copy and
paste that line of code put it right
inside of our touches moved and we will
have that happening and we won't worry
about touches ended this time now let's
build and run and actually we can't see
that image so let's go back to our UI
image you head over to our background
I'm just gonna make it a green
background and build and run and now we
have this green image right here and
this blue image right here thank you all
so much for watching if you enjoyed this
tutorial be sure to hit that like button
down below and if you want to see more
tutorials like this one me in the future
be sure to subscribe also leave
recommendations for tutorials that you
would like to see in the future but
anyway thank you again and I will see
you in didn't okay enough
going to show you how to selectively
move objects with Swift and Xcode using
sprite kit and also not and spring kit
so let's go ahead and get started all
right so first thing we need to do is
head over to Xcode and create a new
Xcode project now this time around it
will be a sprite kick game so click game
and then our product name I'm just going
to call mine touches too as I already
have a previous project language will be
set to swift and game technology will be
sprite kit and devices will be set to
iPhone click Next and create and let's
make this a bit bigger and let's head
right into our game scene swift and
inside of our game scene dev swift
richer is going to delete the label that
we have right up here so delete that and
then we also have this sprite down here
I'm going to keep everything about the
spray except the action that you see
right here and then I'm going to take
this sprite and move this right outside
of the did move to view right above it
just so that it's a public sprite and we
will be April to reference this in
different functions now we can take the
rest of the sprite code and we're going
to put this right into our did move to
view now inside of our did move to view
we have the sprite X scale equals 0.5
sprite dot y scale equals 0.5 sprite dot
position is equal to location which is
no longer valid so we need to change
this equal to CG point and we're going
to make the x value equal to frame dot
width divided by 2 this will put it
right in the middle of the scene and
then our Y value will be equal to frame
dot height divided by 2 as well this
again puts it right in the middle of the
scene now instead of our touches began
we want to make our sprite equal to the
position that we touched so it
automatically creates this for us in
this for touch in touches as a set of UI
touches and the location will be equal
to the touch dot location in node
meaning the location will be equal to
exactly where you touched on the screen
now we need to go down here and we're
going to say if our sprite dot contains
point location so or if it contains the
points inside of the sprite meaning that
we touch the sprite then we want to make
the sprite dot position equal to
location
and now if we were to build and run this
you will see that we have our spaceship
right here and we can click and it'll
move over to that scene but as you can
see I can't click and drag the spaceship
to where I want it to be it's basically
just presenting its center position
equal to that of my mouse or where I
touched so let's head back over to our
game scene dot Swift and inside of this
we need to go right outside of the
touches began and say touches moved so
when the touches are moved we want to do
exactly the same thing we just basically
want to move the sprite position equal
to our location so I'm basically just
copying and pasting all of this for
touch and touches and so on and so forth
and I'm pasting that right into touches
moved and now if we were to build and
run now I can click and drag this
spaceship around and also you'll notice
that I can touch outside of the
spaceship and it won't do anything but
as soon as I touch on the spaceship it
will move and lastly I'm just going to
show you how to do something when the
touches are ended so just say touches
ended and we're going to set the sprite
position equal to half the scene again
so I'm just going to say sprite def
position is equal to CG point X
basically what we set it up in the first
place
now it's build and run this now I can
click and drag this spaceship around and
as soon as I let go it moves back to the
original position and if you have a
second spaceship or sprite that you're
trying to move we need to go up here and
I'm just going to copy and paste this
let's pry equal eske sprite node and I'm
going to name this let sprite two equal
s K sprite note image name spaceship and
then I'm again just going to copy and
paste pretty much everything that you
see right here and paste that right
afterwards and we need to change
anything that's a sprite equal to sprite
two like so and now we have our sprite
two on our scene but I do want to make
it off the scene a little bit so I don't
have them overlapping so I'm going to
make so I'm going to set the Y value
equal to frame height divided by four
and we'll do the same with the x
position and we'll make it divided by
four just so we can differentiate
between the two different spaceships and
now inside of our touches began we just
need to say else if our sprite 2 dot
contains point and this will be again
the location
then we want to move so we can say
sprite to dot position will be equal to
location inside of this and also we need
to do the touches moved so let's just
copy and paste that line of code right
into our touches moved and we can also
do the same with our down here where we
want it to return to the original
position so we can say a sprite two dot
position I'm just going to move up here
to my did move to view and copy and
paste this line of code that you see
right here and paste that right down
here and my touches ended now let's
build and run and now we have this
spaceship right over here this is our
sprite two and as you will see that's a
bit off the scene but it works but one
thing you'll notice is that I can click
and drag this right and as soon as I hit
the other sprite it overrides whatever I
had before and now we're going to do
this the non sprite gateway so let's go
ahead open up Xcode create a new Xcode
project and this will be a single view
application our product name I'm just
going to call mine touches three our
language will be set to Swift and our
devices will be set to iPhone click Next
and create now let's make this a bit
bigger and we're just gonna head right
into our main dot storyboard now inside
of our main dot storyboard I'm just
going to click and drag a uiimageview
onto our seam and I'm going to shrink it
down to whatever size I want put it
right over there and I'm going to change
the background color just so it's
visible to us and now we need to open up
the assistant editor and instead of our
assistant editor should be our view
controller dot Swift so inside of our
view controller dot so if we want to
right-click or control click and drag
from our UI image view over to our view
controller dot Swift we're gonna make
the connection type an outlet and the
name of this outlet will just be our
image connect and now down here we need
to create a new function called touches
began quite surprising and inside of our
touches began we're actually going to
borrow from our sprite kit project that
I just worked on and so let's head back
over to our sprite kit project and I
just take this for and let statement
that you have right here and let's paste
that right
inside of her touches began and there's
a few things we need to change this
should not be touched out location and
note this should be touch dot location
in view and this will be our self dot
view like so and inside of this for
statement we're going to test our image
to see whether it's being touched or not
so we're going to say if the image dot
frame dot contains and we're going to
see if it contains the point of our
location that we have right here and
after that we needed an open curly
bracket enter and close curly bracket
now inside of this if statement we need
to say image dots Center will be equal
to our location like so so now that's
pretty much all the lines of code we
need to move this image next thing we
need to do is have a touches moved like
so and we're just gonna copy and paste
all of this code that we have inside of
our touches began paste that right in
there and if you want to have a touches
ended we can so let's just say touches
ended and we're going to say image dot
Center will be equal to ourself down to
view dot Center like so and now if we
were to build and run this you will see
that we have our big blue you will see
that we have our big blue block right
here and I can click and drag that
around and if I click anywhere else
nothing happens but as soon as I start
clicking on it something happens so as
you can see there's a difference between
sprite kits and the non sprite kit way
of doing things now if you want to add a
second image we can add that image right
in here and we can click right click or
control click and drag from the CM at
uiimageview and create this image like
so we're going to call this image to
connect and inside of our touches began
we need to do pretty much do the exact
same thing we need to say if our image
to frame dot contains point and this
will be location then if we want to move
our image to and we can change the
position of our image to chest by easily
saying image to dot Center will be equal
to location and now we can copy and
paste that line of code put it right
inside of our touches moved and we will
have that happening and we won't worry
about touches ended this time now let's
build and run and actually we can't see
that image so let's go back to our UI
image you head over to our background
I'm just gonna make it a green
background and build and run and now we
have this green image right here and
this blue image right here thank you all
so much for watching if you enjoyed this
tutorial be sure to hit that like button
down below and if you want to see more
tutorials like this one me in the future
be sure to subscribe also leave
recommendations for tutorials that you
would like to see in the future but
anyway thank you again and I will see
you in didn't okay enough
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Dec 23, 2024 Last updated |
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