hi friend i created this method for image select it working proper but i am facing problem on image when i touch the image i cant see image click or not i want highlight the image when i touch on it how can i do this
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
UITouch *touch = [[event allTouches] anyObject];
CGPoint location= [touch locationInView:self.view];
if(CGRectContainsPoint(firstImage.frame, location))
{
// flag like
select=1;
}
else if(CGRectContainsPoint(secImage.frame, location))
{
select=2;
}
[mComment resignFirstResponder];
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [[event allTouches] anyObject];
CGPoint location = [touch locationInView:self.view];
if(CGRectContainsPoint(firstImage.frame, location)) {
if(select==1) {
var=1;
}}
else if(CGRectContainsPoint(secImage.frame, location)) {
if(select==2) {
vars=1;
}}
select=0;
}
One thing you can do for highlight the image when you touch on it. When you touch on image you should change the alpha of selected image in touch began method and reset the image alpha in touch ended method. So its look like button.
For Ex.
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
UITouch *touch = [[event allTouches] anyObject];
CGPoint location= [touch locationInView:self.view];
if(CGRectContainsPoint(firstImage.frame, location))
{
// flag like
select=1;
firstImage.alpha = 0.5;
}
else if(CGRectContainsPoint(secImage.frame, location))
{
select=2;
secImage.alpha = 0.5;
}
[mComment resignFirstResponder];
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [[event allTouches] anyObject];
CGPoint location = [touch locationInView:self.view];
if(CGRectContainsPoint(firstImage.frame, location)) {
if(select==1) {
firstImage.alpha = 1.0;
var=1;
}}
else if(CGRectContainsPoint(secImage.frame, location)) {
if(select==2) {
secImage.alpha = 1.0;
vars=1;
}}
select=0;
}
Related
While dragin multi objects using the following code the the object is shaking when i touch the object,
-(void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [[event allTouches] anyObject];
if ([touch view] == img1)
{
CGPoint location = [touch locationInView:touch.view];
img1.center = location;
return;
}
if (touch.view == img2)
{
CGPoint location = [touch locationInView:touch.view];
img2.center = location;
return;
}
}
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
[self touchesBegan:touches withEvent:event];
}
What is problem in my code, is there any other method to drag and if the view contain one more object?please help me to solve this issue
I think if you are talking about more object to drag all at once then you should remove the return from you touch begain method
I did this touch actions in UIView, ie,
in a uiview there are two or three subviews v1,v2,v3. I used the code below to place the image i1,i2,i3 in corresponding views and if I moves the touch the images move to that point in the view.
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [touches anyObject];
if ([touch view] == v1)
{
CGPoint location = [touch locationInView:v1];
i1.center = location;
}
else if([touch view] == v2)
{
CGPoint location = [touch locationInView:v2];
i2.center = location;
}
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [touches anyObject];
if ([touch view] == v1)
{
CGPoint location = [touch locationInView:v1];
i1.center = location;
}
else if([touch view] == v2)
{
CGPoint location = [touch locationInView:v1];
i2.center = location;
}
}
Now I have to do this for a sequence of 28 images so I went for Uiscrollview but I cant get that please explain me clearly with code. thanks a lot in advance for your help.
You need to subclass UIScrollView to get touch events of UIScrollView.
I know how to drag a view or object:
- (void) touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{
UITouch *touch = [[event allTouches] anyObject];
if( [touch view] == ViewMain)
{
CGPoint location = [touch locationInView:self.view];
ViewMain.center = location;
}
}
but I would like to start dragging that view or image from the point where I touched it. for example if I drag (I highlighted the view and placed blue on the cursor):
the moment I start dragging if I drag the mouse 20 px to the right for example then I would like the view to also drag 20 px instead of:
maybe I have to change the center of the view to the point where I fist touch it. How could I do that?
In other words I would like to do something like when you drag the apps on the iPad:
float startX = 0;
float startY = 0;
-(void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [[event allTouches] anyObject];
if( [touch view] == ViewMain)
{
CGPoint location = [touch locationInView:self.view];
startX = location.x - ViewMain.center.x;
startY = ViewMain.center.y;
}
}
- (void) touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{
UITouch *touch = [[event allTouches] anyObject];
if( [touch view] == ViewMain)
{
CGPoint location = [touch locationInView:self.view];
location.x =location.x - startX;
location.y = startY;
ViewMain.center = location;
}
}
i have created an application in which there are 2 imageviews and i have added image on image view.i wnt that when i click on my image the image should get selected and the value should be saved in sqlite database.So for that i have created touches method,and added flags for both the images so when particular image is selected it is identified by its flag.
this is my code:
-(void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [[event allTouches] anyObject];
CGPoint location= [touch locationInView:self.view];
if(CGRectContainsPoint(firstImage.frame, location))
{
//set some flag like
select=1;
}
else if(CGRectContainsPoint(secImage.frame, location))
{
select=2;
}
[mComment resignFirstResponder];
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [[event allTouches] anyObject];
CGPoint location = [touch locationInView:self.view];
if(CGRectContainsPoint(firstImage.frame, location)) {
if(select==1) {
var=1;
}
else if(CGRectContainsPoint(secImage.frame, location)) {
if(select==2) {
vars=2;
}
select=0;
}
}
}
But i am having a problem,when i select my first image it properly gets into the if part and stores value 1 into var 1 but when i click secimage it does not enter into elseif part,it just comes out of the loop.What may be the problem .Please help me in solving this problem.thanks
The following change should fix the problem:
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [[event allTouches] anyObject];
CGPoint location = [touch locationInView:self.view];
if(CGRectContainsPoint(firstImage.frame, location)) {
if(select==1) {
var=1;
}}
if(CGRectContainsPoint(secImage.frame, location)) {
if(select==2) {
vars=2;
}}
select=0;
}
Your above code wasn't working because if(CGRectContainsPoint(firstImage.frame, location) == YES, it will never reach the line if(CGRectContainsPoint(secImage.frame, location)
The code could also be cleaned up a bit. Not sure this is the ideal way of implementing these two methods, but it could work anyway.
May be your code has a mistake? Try this
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [[event allTouches] anyObject];
CGPoint location = [touch locationInView:self.view];
if(CGRectContainsPoint(firstImage.frame, location)) {
if(select==1)
{
var=1;
}
}
else if(CGRectContainsPoint(secImage.frame, location))
{
if(select==2)
{
vars=2;
}
select=0;
}
}
i like to drag this object vertically instead of horizontally, which is doin it now:
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [[event allTouches] anyObject];
CGPoint location = [touch locationInView:touch.view];
if (CGRectContainsPoint(myObject.frame, location)){
CGPoint xLocation = CGPointMake(location.x, myObject.center.y);
myObject.center = xLocation;
}
}
CGPoint yLocation = CGPointMake(myObject.center.x, location.y);
myObject.center = yLocation;