iPhone coding - compiler error - stray /342, stray/200, stary/223 ... why? - iphone

Question

i'm trying to implement this code for accelerometer use but i'm getting a compiler error:
stray /342, stray/200 ... for size,currentTouch, position object's and so on ...
why?
code:
//GravityObj.h
#interface GravityObj : UIView {
CGPoint position;
CGSize size;
CGPoint velocity;
NSTimer *objTimer;
NSString *pngName;
CGFloat bounce;
CGFloat gravity;
CGPoint acceleratedGravity;
CGPoint lastTouch;
CGPoint currentTouch;
BOOL dragging;
}
#property CGPoint position;
#property CGSize size;
#property CGPoint velocity;
#property(nonatomic,retain)NSString *pngName;
#property(nonatomic,retain)NSTimer *objTimer;
#property CGFloat bounce;
#property CGFloat gravity;
#property CGPoint acceleratedGravity;
#property CGPoint lastTouch;
#property CGPoint currentTouch;
#property BOOL dragging;
- (id)initWithPNG:(NSString*)imageName position:(CGPoint)p size:(CGSize)s;
- (void)update;
- (void)onTimer;
#end
//GravityObj.m
#import "GravityObj.h"
#implementation GravityObj
#synthesize position, size;
#synthesize objTimer;
#synthesize velocity;
#synthesize pngName;
#synthesize bounce;
#synthesize gravity, acceleratedGravity;
#synthesize lastTouch, currentTouch;
#synthesize dragging;
- (id)initWithPNG:(NSString*)imageName position:(CGPoint)p size:(CGSize)s {
if (self = [super initWithFrame:CGRectMake(p.x, p.y, s.width, s.height)]) {
[self setPngName:imageName];
[self setPosition:p];
[self setSize:s];
[self setBackgroundColor:[UIColor clearColor]];
// Set default gravity and bounce
[self setBounce:-0.9f];
[self setGravity:0.5f];
[self setAcceleratedGravity:CGPointMake(0.0, gravity)];
[self setDragging:NO];
UIImageView *prezzie = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, s.width, s.height)];
prezzie.image = [UIImage imageNamed:imageName];
[self addSubview:prezzie];
[prezzie release];
[[UIAccelerometer sharedAccelerometer] setDelegate:self];
}
return self;
}
- (void)update {
[self setNeedsDisplay];
if(dragging) return;
velocity.x += acceleratedGravity.x;
velocity.y += acceleratedGravity.y;
position.x += velocity.x;
position.y += velocity.y;
if(position.x + size.width >= 320.0) {
position.x = 320.0 – size.width;
velocity.x *= bounce;
}
else if(position.x <= 0.0) {
velocity.x *= bounce;
}
if(position.y + size.height >= 416.0) {
position.y = 416.0 – size.height;
velocity.y *= bounce;
}
else if(position.y <= 0.0) {
velocity.y *= bounce;
}
self.frame = CGRectMake(position.x, position.y, size.width, size.height);
}
- (void)onTimer {
[self update];
}
- (void)drawRect:(CGRect)rect {
// Drawing code
}
/* EVENTS */
- (void)accelerometer:(UIAccelerometer *)accelerometer didAccelerate:(UIAcceleration *)acceleration {
acceleratedGravity.x = acceleration.x * gravity;
acceleratedGravity.y = -acceleration.y * gravity;
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
// First, lets check to make sure the timer has been initiated
if (objTimer == nil) {
objTimer = [NSTimer scheduledTimerWithTimeInterval:1.0 / 30.0 target:self selector:#selector(onTimer) userInfo:nil repeats:YES];
}
UITouch *touch = [touches anyObject];
[self setCurrentTouch:[touch locationInView:self]];
CGFloat dx = currentTouch.x – position.x;
CGFloat dy = currentTouch.y – position.y;
CGFloat dist = sqrt(dx * dx + dy * dy);
if(dist < size.width) {
[self setVelocity:CGPointMake(0.0, 0.0)];
[self setDragging:YES];
}
[self setLastTouch:currentTouch];
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [touches anyObject];
[self setCurrentTouch:[touch locationInView:self]];
[self setDragging:YES];
[self setVelocity:CGPointMake(currentTouch.x – lastTouch.x, currentTouch.y – lastTouch.y)];
[self setLastTouch:currentTouch];
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
[self setDragging:NO];
}
- (void)dealloc {
[objTimer release], objTimer = nil;
[pngName release], pngName = nil;
[super dealloc];
}
#end

Answer 1

It looks like the minus signs in some of your lines were Unicode characters that display as minuses and aren't. I copied your code into Xcode and got the same error. I then retyped each line that had the error and it worked.
Here's the fixed version (.m file only):
#implementation GravityObj
#synthesize position, size;
#synthesize objTimer;
#synthesize velocity;
#synthesize pngName;
#synthesize bounce;
#synthesize gravity, acceleratedGravity;
#synthesize lastTouch, currentTouch;
#synthesize dragging;
- (id)initWithPNG:(NSString*)imageName position:(CGPoint)p size:(CGSize)s {
if (self = [super initWithFrame:CGRectMake(p.x, p.y, s.width, s.height)]) {
[self setPngName:imageName];
[self setPosition:p];
[self setSize:s];
[self setBackgroundColor:[UIColor clearColor]];
// Set default gravity and bounce
[self setBounce:-0.9f];
[self setGravity:0.5f];
[self setAcceleratedGravity:CGPointMake(0.0, gravity)];
[self setDragging:NO];
UIImageView *prezzie = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, s.width, s.height)];
prezzie.image = [UIImage imageNamed:imageName];
[self addSubview:prezzie];
[prezzie release];
[[UIAccelerometer sharedAccelerometer] setDelegate:self];
}
return self;
}
- (void)update {
[self setNeedsDisplay];
if(dragging) return;
velocity.x += acceleratedGravity.x;
velocity.y += acceleratedGravity.y;
position.x += velocity.x;
position.y += velocity.y;
if(position.x + size.width >= 320.0) {
position.x = 320.0 - size.width;
velocity.x *= bounce;
}
else if(position.x <= 0.0) {
velocity.x *= bounce;
}
if(position.y + size.height >= 416.0) {
position.y = 416.0 - size.height;
velocity.y *= bounce;
}
else if(position.y <= 0.0) {
velocity.y *= bounce;
}
self.frame = CGRectMake(position.x, position.y, size.width, size.height);
}
- (void)onTimer {
[self update];
}
- (void)drawRect:(CGRect)rect {
// Drawing code
}
/* EVENTS */
- (void)accelerometer:(UIAccelerometer *)accelerometer didAccelerate:(UIAcceleration *)acceleration {
acceleratedGravity.x = acceleration.x * gravity;
acceleratedGravity.y = -acceleration.y * gravity;
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
// First, lets check to make sure the timer has been initiated
if (objTimer == nil) {
objTimer = [NSTimer scheduledTimerWithTimeInterval:1.0 / 30.0 target:self selector:#selector(onTimer) userInfo:nil repeats:YES];
}
UITouch *touch = [touches anyObject];
[self setCurrentTouch:[touch locationInView:self]];
CGFloat dx = currentTouch.x - position.x;
CGFloat dy = currentTouch.y - position.y;
CGFloat dist = sqrt(dx * dx + dy * dy);
if(dist < size.width) {
[self setVelocity:CGPointMake(0.0, 0.0)];
[self setDragging:YES];
}
[self setLastTouch:currentTouch];
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [touches anyObject];
[self setCurrentTouch:[touch locationInView:self]];
[self setDragging:YES];
[self setVelocity:CGPointMake(currentTouch.x - lastTouch.x, currentTouch.y - lastTouch.y)];
[self setLastTouch:currentTouch];
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
[self setDragging:NO];
}
- (void)dealloc {
[objTimer release], objTimer = nil;
[pngName release], pngName = nil;
[super dealloc];
}
#end
If you get that error again, I found that viewing the file in FileMerge can help; it doesn't seem to know Unicode as well as Xcode.

Answer 2

You can pick up stray /342 /200 from copy/paste usually from pdf's sometimes html. Paste to a terminal and copy back out for a quick fix.

Answer 3

yes, i had also faced such types of error, it can be solved by just removing some unwanted formatted line space like gray focused line which is copied with content of code which you copied from other sites or web page or PDF file. It will definitely remove such types of error by removing extra formatted line or by just copy paste that code portion into notepad and original text copy back to your code..its done.!!!