How to clear all object on NSView in Cocoa

Question

I want to clear all objects which added to NSVIew before call any function. How can I do that?

What are you trying to accomplish? Are you creating the view programmatically or loading from a Nib/xib — uchuugaka, Jul 23 '13 at 09:20

Lithu T.V · Answer 1 · 2013-07-29T04:55:02.970

5

I use the following function

-(void)clearAllSubviewsOfView :(NSView *)parent
{
    for (NSView *subview in [parent subviews]) {
        [subview removeFromSuperview];
    }
}

edited Jul 29 '13 at 04:55

answered Jul 23 '13 at 09:21

Lithu T.V

19,955
12
56
101

1

Look's like it should be `[parent subviews]` – Keith Smiley Jul 28 '13 at 05:06

score 0 · Answer 2 · answered Jul 23 '13 at 09:04

You can make something like this:

// TSClearSupporting.h

@protocol TSClearSupporting <NSObject>
- (void) clear;
@end

// TSTextField.h

#import <Cocoa/Cocoa.h>
#import "TSClearSupporting.h"

@interface TSTextField : NSTextField <TSClearSupporting>
@end

// TSTextField.m

#import "TSTextField.h"

@implementation TSTextField
- (void) clear
{
    self.stringValue = @"";
}
@end

// TSMainView.m

#import "TSMainView.h"
#import "TSClearSupporting.h"

@implementation TSMainView

- (IBAction) clearAll: (id)sender
{
    NSArray* subViews = self.subviews;

    for (NSView* view in subViews)
    {
        if ([view conformsToProtocol: @protocol(TSClearSupporting)])
        {
            [view performSelector: @selector(clear)];
        }
    }
}

How to clear all object on NSView in Cocoa

2 Answers2