NSSlider如何定制以提供可可的非线性尺度？ [英] How can NSSlider be customised to provide a non-linear scale in cocoa?

问题描述

NSSlider如何定制以提供可可的非线性尺度？即 - 0,2,4,6,10。

滑块被限制在停止在刻度线上时，我希望滑块停止在0,2,4 ，6,10（例如不是8）。感谢。

解决方案

基于具有所需值的数组的快速写入示例：

SampleAppDelegate.h

  #import< Cocoa / Cocoa.h> 
 
 @interface SampleAppDelegate：NSObject< NSApplicationDelegate> {
 
 NSWindow * window; 
 NSArray * values; 
 
 IBOutlet NSSlider * theSlider; 
 IBOutlet NSTextField * theLabel; 
 
} 
 
  - （IBAction）sliderChanged：（id）sender; 
 
 @property（assign）IBOutlet NSWindow * window; 
 
 @end 
  

SampleAppDelegate.h

  #importSampleAppDelegate.h
 
 @implementation SampleAppDelegate 
 
 @合成窗口; 
 
  - （void）applicationDidFinishLaunching：（NSNotification *）aNotification {
 
 values = [[NSArray alloc] initWithObjects：@0，@1，@2 ，@10，@50，nil]; 
 
 [theSlider setNumberOfTickMarks：[values count]]; 
 [theSlider setMinValue：0]; 
 [theSlider setMaxValue：[values count] -1]; 
 [theSlider setAllowsTickMarkValuesOnly：YES]; 
 
 [theLabel setStringValue：[values objectAtIndex：0]]; 
 [theSlider setIntValue：0]; 
 
 
} 
 
  - （IBAction）sliderChanged：（id）sender {
 
 int current = lroundf（[TheSlider floatValue]） ; 
 [theLabel setStringValue：[values objectAtIndex：current]]; 
 
} 
 
 @end 
  

：

- 添加NSSlider（连接IBOutlet /连接IBAction /启用连续更新）

- 添加NSTextField（连接IBOutlet）

结果：

p>

How can NSSlider be customised to provide a non-linear scale in cocoa? i.e - 0, 2, 4, 6, 10.

With the slider constrained to stopping on tick marks only, I want the slider to stop on 0, 2, 4, 6, 10 (and not 8 for instance). Thanks.

解决方案

Quickly written example based on an array with the desired values:

SampleAppDelegate.h

#import <Cocoa/Cocoa.h>

@interface SampleAppDelegate : NSObject <NSApplicationDelegate> {

    NSWindow * window;
    NSArray * values;

    IBOutlet NSSlider * theSlider;
    IBOutlet NSTextField * theLabel;

}

- (IBAction)sliderChanged:(id)sender;

@property (assign) IBOutlet NSWindow *window;

@end

SampleAppDelegate.h

#import "SampleAppDelegate.h"

@implementation SampleAppDelegate

@synthesize window;

- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {

    values = [[NSArray alloc] initWithObjects:@"0",@"1",@"2",@"10",@"50",nil];

    [theSlider setNumberOfTickMarks:[values count]];
    [theSlider setMinValue:0];
    [theSlider setMaxValue:[values count]-1];
    [theSlider setAllowsTickMarkValuesOnly:YES];

    [theLabel setStringValue:[values objectAtIndex:0]];
    [theSlider setIntValue:0];


}

- (IBAction)sliderChanged:(id)sender {

    int current = lroundf([theSlider floatValue]);
    [theLabel setStringValue:[values objectAtIndex:current]];

}

@end

Interface Builder:
- Add NSSlider (connect IBOutlet / connect IBAction / enable continuos updating)
- Add NSTextField (connect IBOutlet)

Result:

这篇关于NSSlider如何定制以提供可可的非线性尺度？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！