Objective-C vs. Delphi: Syntax
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Objective-C vs. Delphi: Syntax
| Objective-C | Delphi |
@interface Rectangle: GeometricObject
{
@private
float with;
float height;
}
+(void)aClassMethod;
-(id)init;
-(id)dealloc;
-(void)setSize:(float)aWidth:(float)aHeight;
@end
|
interface
type
Rectangle = class(GeometricObject)
private
width: extended;
height: extended;
public
constructor create; virtual;
destructor destroy;
class aClassMethod; virtual;
procedure setSize(aWidth,
aHeight: extended); virtual;
end;
implementation
class procedure Rectangle.aClassMethod;
begin
...
end;
constructor Rectangle.create;
begin
inherited create;
width:=0;
height:=0;
end;
destructor Rectangle.destroy;
begin
...
inherited destroy;
end;
procedure Rectangle.setSize(aWidth, aHeight: extended);
begin
width:=aWidth;
height:=aHeight;
end;
end.
|
#import "Rectangle.h"
@implementation Rectangle
+(void)aClassMethod
{
...
}
-(id)init
{
[super init];
width=0;
height=0;
return self;
}
-(id)dealloc
{
...
[super dealloc]
}
-(void)setSize:(float)aWidth:(float)aHeight
{
width=aWidth;
height=aHeight;
}
@end
|
|
#include <Rectangle.h>
void main()
{
id anyObject;
Rectangle *aRect;
anyObject = [[Rectangle alloc] init];
[anyObject setSize:1:2]; // this is
dynamic!
if ([anyObject respondsTo:
@selector(setSize::)])
[anyObject setSize:1:2]; // this is save!
aRect = [[Rectangle alloc] init];
[aRect setSize:10:5];
[aRect free];
[aRect free];
exit (0);
}
|
uses rectangle.pas; var anyObject: TObject; aRect: Rectangle; begin anyObject:=Rectangle.create; // anyObject.setSize(1,2); NOT POSSIBLE! aRect:=Rectangle.create; aRect.setSize(10,5); aRect.free; anyObject.free; halt(0); end. |
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