Cocoa API解説(macOS/iOS)

iOS , Mac アプリケーション開発のために使われる主要フレームワークの日本語情報です。

目次

scaleBy:


Index>Foundation>NSAffineTransform

原点を中心に座標の拡大縮小をセットします
-(void)scaleBy:(float)scale:

解説

原点を中心に座標の拡大縮小をセットします。
scale 倍率
(NSAffineTransformクラス、10.3までのAppKitから10.4からFoundationに変更)

返り値

( void )

なし

引数

( float )scale

倍率(1.0が等倍)

クラス

NSAffineTransform

Instance Methods

使用可能

10.0

参照

- rotateByDegrees:
- rotateByRadians:
- scaleXBy:yBy:
- translateXBy:yBy:

例文

#pragma mark -scaleBy:
- (IBAction)method005:(id)sender {
    //make bezier path
	NSBezierPath *thePath1 = [NSBezierPath bezierPath];
	
    //make affin transform
    NSAffineTransform *affin = [NSAffineTransform transform];
	
    //focus window's view
    [_window.contentView lockFocus];
        //clear window
        NSRect rect = [_window.contentView frame ];
        [[NSColor windowBackgroundColor] set];
        NSRectFill(rect);
        //set winding rule
        [thePath1 setWindingRule:NSEvenOddWindingRule];
        //move pen
        [thePath1 moveToPoint:NSMakePoint(20,20)];
        //make path
        [thePath1 appendBezierPathWithOvalInRect:NSMakeRect(50,50,100,100)];
        [thePath1 appendBezierPathWithOvalInRect:NSMakeRect(20,20,80,80)];
        //set color
        [[NSColor blueColor] set];
        
        //fill path
        [thePath1 fill];
        
        //set transform
        [affin scaleBy:1.5];
        [thePath1 transformUsingAffineTransform: affin];
        
        //set color
        [[NSColor redColor] set];
        [thePath1 fill];
    //unlock focus
    [_window.contentView unlockFocus];
    [_window.contentView displayIfNeeded];
}
#import "MyView.h"

@implementation MyView


-(void)drawRect:(NSRect)rect
{
	
	NSBezierPath *thePath1 = [NSBezierPath bezierPath];
	NSAffineTransform *affin = [NSAffineTransform transform];
	
	[thePath1 setWindingRule:NSEvenOddWindingRule];
	
	[thePath1 moveToPoint:NSMakePoint(20,20)];
	
	[thePath1 appendBezierPathWithOvalInRect:NSMakeRect(50,50,100,100)];
	[thePath1 appendBezierPathWithOvalInRect:NSMakeRect(20,20,80,80)];
	
	[[NSColor blueColor] set];
	[thePath1 fill];
	
	[affin scaleBy:1.5];
	
	
	[thePath1 transformUsingAffineTransform: affin];
	
	[[NSColor redColor] set];
	[thePath1 fill];
	
	
	
	
}

@end