问题
Is there a way I can get ALL the views and subviews and subviews of these subviews (you get the idea...) of an NSWindow?
Thanks.
回答1:
Here is a category on NSView:
@interface NSView (MDRecursiveSubviews)
- (NSArray *)allSubviews;
@end
@implementation NSView (MDRecursiveSubviews)
- (NSArray *)allSubviews {
NSMutableArray *allSubviews = [NSMutableArray arrayWithObject:self];
NSArray *subviews = [self subviews];
for (NSView *view in subviews) {
[allSubviews addObjectsFromArray:[view allSubviews]];
}
return [[allSubviews copy] autorelease];
}
@end
With a quick nib file I created with a view hierarchy, it printed this:
[RecursiveSubviewsAppDelegate awakeFromNib] allSubviews == (
"<NSView: 0x10390dfd0>",
"<NSView: 0x103c07ae0>",
"<NSView: 0x100129cc0>",
"<NSButton: 0x100115ce0>",
"<NSButton: 0x100116900>",
"<NSButton: 0x1001165c0>",
"<NSButton: 0x100116130>",
"<NSButton: 0x100114ad0>",
"<NSButton: 0x100115910>",
"<NSButton: 0x100115090>",
"<NSScrollView: 0x103b07a30>",
"<NSClipView: 0x103b07d40>",
"<NSTextView: 0x103b083c0>\n
Frame = {{0.00, 0.00}, {159.00, 58.00}},
Bounds = {{0.00, 0.00}, {159.00, 58.00}}\n
Horizontally resizable: NO, Vertically resizable: YES\n
MinSize = {159.00, 58.00}, MaxSize = {463.00, 10000000.00}\n",
"<NSScroller: 0x1001145b0>",
"<NSScroller: 0x100114840>",
"<NSScrollView: 0x10390ea00>",
"<NSClipView: 0x10390ef10>",
"<NSTableView: 0x10390f570>",
"<NSScroller: 0x103b06f10>",
"<NSScroller: 0x103b07460>",
"<NSClipView: 0x1039105d0>",
"<NSTableHeaderView: 0x103910300>",
"<_NSCornerView: 0x103911c20>"
One note of concern I should add is that it's unclear to me how this would be useful, except as a debugging tool. But even then, there are probably easier ways of doing things.
回答2:
There's a private message that can be sent on NSView to print the control hierarchy.
[NSView _subtreeDescription] gives you the whole hierarchy of the NSView i.e. its children and their children.
回答3:
static void dumpViews(NSView* v, int level) {
NSString* indent = @"";
for (int i = 0; i < level; i++) {
indent = [indent stringByAppendingString:@" "];
}
NSLog(@"%@%@ %@", indent, [v class], NSStringFromRect(v.frame));
if (v.subviews != null) {
for (id s in v.subviews) {
dumpViews(s, level + 1);
}
}
}
- (void) windowControllerDidLoadNib: (NSWindowController*) controller {
NSWindow* window = controller.window;
dumpViews(window.contentView, 0);
...
回答4:
If I understood you correctly, you would have to create a method that calls itself recursively. Something like this:
- (NSArray *)allSubviewsOfView:(NSView *)view
{
NSMutableArray *subviews = [[view subviews] mutableCopy];
for (NSView *subview in [view subviews])
[subviews addObjectsFromArray:[self allSubviewsOfView:subview]]; //recursive
return subviews;
}
You would then call something like
NSArray *allSubviewsOfWindow = [self allSubviewsOfView:[window contentView]];
to get your views. (And don't forget to do memory management if you're not using GC.)
回答5:
Not sure about infinite recursion in the other answers but you definitely can't modify an array while you are doing a fast enumeration on it. Here's a method I wrote for iOS that iterates through all subviews until there aren't any more left to explore. I assume the same or similar would work for NSView. Hope this helps.
(Edit: now… if I had just looked a little further down my search results, I would have found this really easy way to do it first: How can I loop through all subviews of a UIView, and their subviews and their subviews )
- (NSMutableArray *)allSubviewsInView:(UIView *)parentView {
NSMutableArray *allSubviews = [[NSMutableArray alloc] initWithObjects: nil];
NSMutableArray *currentSubviews = [[NSMutableArray alloc] initWithObjects: parentView, nil];
NSMutableArray *newSubviews = [[NSMutableArray alloc] initWithObjects: parentView, nil];
while (newSubviews.count) {
[newSubviews removeAllObjects];
for (UIView *view in currentSubviews) {
for (UIView *subview in view.subviews) [newSubviews addObject:subview];
}
[currentSubviews removeAllObjects];
[currentSubviews addObjectsFromArray:newSubviews];
[allSubviews addObjectsFromArray:newSubviews];
}
NSLog(@"\n%d total subviews:\n%@",allSubviews.count, allSubviews);
return allSubviews;
}
Logged results from a sample view:
18 total subviews:
(
"<UIRoundedRectButton: 0x6a7a590; frame = (26 20; 72 37); opaque = NO; autoresize = RM+BM; layer = <CALayer: 0x6a772d0>>",
"<UISwitch: 0x6a7f930; frame = (26 76; 79 27); opaque = NO; autoresize = RM+BM; layer = <CALayer: 0x6a7fa20>>",
"<UIImageView: 0x685e4a0; frame = (82 20; 139 139); clipsToBounds = YES; opaque = NO; layer = <CALayer: 0x685eca0>>",
"<UITextView: 0x6893e40; frame = (20 196; 192 79); text = 'Lorem ipsum dolor sit er ...'; clipsToBounds = YES; autoresize = RM+BM; layer = <CALayer: 0x687c330>; contentOffset: {0, 0}>",
"<UIView: 0x6a88af0; frame = (26 304; 198 123); autoresize = RM+BM; tag = 1; layer = <CALayer: 0x6a88b20>>",
"<UIButtonLabel: 0x6a7f410; frame = (0 0; 0 0); clipsToBounds = YES; hidden = YES; opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0x6a7f4d0>>",
"<_UISwitchInternalView: 0x6a7fa50; frame = (-1 0; 79 27); layer = <CALayer: 0x6a79b90>>",
"<UITextSelectionView: 0x6894070; frame = (0 0; 0 0); userInteractionEnabled = NO; layer = <CALayer: 0x68940d0>>",
"<UIImageView: 0x68924b0; frame = (0 72; 192 7); alpha = 0; opaque = NO; autoresize = TM; userInteractionEnabled = NO; layer = <CALayer: 0x6892520>>",
"<UIImageView: 0x6894100; frame = (185 0; 7 79); alpha = 0; opaque = NO; autoresize = LM; userInteractionEnabled = NO; layer = <CALayer: 0x6894180>>",
"<UIWebDocumentView: 0x7416600; frame = (0 0; 192 394); text = 'Lorem ipsum dolor sit er ...'; opaque = NO; userInteractionEnabled = NO; layer = <UIWebLayer: 0x6895330>>",
"<UIView: 0x6a88b50; frame = (10 10; 80 80); autoresize = W+H; tag = 2; layer = <CALayer: 0x6a88b80>>",
"<UIImageView: 0x6a80610; frame = (1 0; 77 27); opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0x6a80650>>",
"<UIView: 0x6a806f0; frame = (1 0; 77 27); clipsToBounds = YES; alpha = 0; layer = <CALayer: 0x6a80720>>",
"<UIView: 0x6a88fa0; frame = (5 5; 50 50); autoresize = W+H; tag = 3; layer = <CALayer: 0x6a88fd0>>",
"<UIImageView: 0x6a808e0; frame = (-2 0; 79 27); opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0x6a84d30>>",
"<UIImageView: 0x6a84c00; frame = (-2 0; 131 27); opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0x6a84d90>>",
"<UIImageView: 0x6a84c40; frame = (49 0; 29 27); userInteractionEnabled = NO; layer = <CALayer: 0x6a84c80>>"
)
回答6:
The above solution will not work if there are views within views. We would need to do a recursive solution as shown below.
-(void) printViewHierarchy: (UIView * ) view withTag: (NSInteger) tag {
if (view == nil) {
return;
}
if (view == nil || [view tag] == tag) {
NSLog(@"%@", view);
return;
}
for (UIView * subview in [view subviews]) {
[self printViewHierarchy: subview withTag: tag];
}
}
- (void) findAllViews {
UIView * baseView = [UIView new];
[baseView setTag: 1];
UIView * secondRowA = [UIView new];
[secondRowA setTag: 2];
UIView * secondRowB = [UIView new];
[secondRowB setTag: 3];
UIView * thirdRowA = [UIView new];
[thirdRowA setTag: 4];
UIView * thirdRowB = [UIView new];
[thirdRowB setTag: 5];
[secondRowA addSubview: thirdRowA];
[secondRowB addSubview: thirdRowB];
[baseView addSubview: secondRowA];
[baseView addSubview: secondRowB];
[self printViewHierarchy: baseView withTag: 6];
}回答7:
NSArray *arrofView = [[self view] subviews];
来源：https://stackoverflow.com/questions/5446928/get-all-views-and-subview-of-nswindow