making a common class

[schenker]

Hi, i need to often include the below codes for animation purpose throughout my program. For efficiency purpose, i would like to make this as a class that i can often refer to.

            UIImageView *gameOver;
            gameOver=[[UIImageView alloc]initWithFrame:CGRectMake(0, 0, 320, 477)];
            gameOver.image=[UIImage imageNamed:@"gameover.png"];
            gameOver.alpha=0.0;
            [self.view addSubview:gameOver];
            [UIView beginAnimations:nil context:gameOver];
            [UIView setAnimationDuration:2.0];
            gameOver.alpha=1.0;
            [UIView commitAnimations];
            [gameOver release];

How can i make this as a common class?

i tried creating a Transition class, but not sure if it is right. The codes are as follows:

+(void)beginTransition:(UIImageView *)theImageView:(struct CGRectMake *)dimension:(NSString *)imageFile:(float)startAlpha:(float)endAlpha;

Hope to get some help. Thanks.

[rocotilos]

For me I just do it like this:

-(void)beginTransition:(UIImageView *)theImageView:(CGRect *)dimension:(NSString *)imageFile:(CGFloat)startAlpha:(CGFloat)endAlpha;

[schenker]

Originally Posted by rocotilos

For me I just do it like this:

-(void)beginTransition:(UIImageView *)theImageView:(CGRect *)dimension:(NSString *)imageFile:(CGFloat)startAlpha:(CGFloat)endAlpha;

Hi, Thanks. But how do you pass the coordinates and dimensions to CGRect in the implementation. I've searched everywhere but cant find anything to help me.

[new2objectivec]

CGRectMake would return a CGRect

e.g.:
CGRect rect1 = CGRectMake(100, 100, 100, 100);
CGRect rect2 = CGRectMake(190, 190, 100, 100);

Have a look at http://iphonedevelopertips.com/c/cgr...functions.html

[schenker]

Originally Posted by new2objectivec

CGRectMake would return a CGRect

e.g.:
CGRect rect1 = CGRectMake(100, 100, 100, 100);
CGRect rect2 = CGRectMake(190, 190, 100, 100);

Have a look at CGRect, CGSize and CGPoint Functions

i did the following in my, .h file:

#import <UIKit/UIKit.h>

struct Rectangle {
    float point_x;
    float point_y;
    float width;
    float height;
};



@interface Transition : UIViewController {
    
    struct Rectangle *rectangle;     
 
}

@property struct Rectangle *rectangle;


-(void)beginTransition:(UIImageView *)theImageView:(CGRect)dimension:(NSString *)imageFile:(float)startAlpha:(float)endAlpha;

@end

in my .m file i did this:

#import "Transition.h"


@implementation Transition


@synthesize rectangle;

-(void)beginTransition:(UIImageView *)theImageView:(CGRect )dimension:(NSString *)imageFile:(float)startAlpha:(float)endAlpha
{
    UIImageView *myImageView=theImageView;
    
    CGRect myrect=CGRectMake(rectangle->point_x, rectangle->point_y, rectangle->width, rectangle->height);
    myrect=dimension;
    
    
    myImageView=[[UIImageView alloc]initWithFrame:dimension];
    myImageView.image=[UIImage imageNamed:imageFile];
    myImageView.alpha=startAlpha;
    [self.view addSubview:myImageView];
    [UIView beginAnimations:nil context:myImageView];
    [UIView setAnimationDuration:2.0];
    myImageView.alpha=endAlpha;
    [UIView commitAnimations];
    [myImageView release];

}


@end

I know something is terribly wrong in my .m file, esp the way im using the structure. Sure enough program crashes when executing that portion. Where am i going wrong? Thanks.

[schenker]

Great! i fixed it myself. Thanks for all your response.