This is what happens when I create an NSProgressIndicator and use NSStatusItem's -setView: method to display it in the menubar area while I'm performing an action:
Example of messed up NSProgressIndicator http://cl.ly/l9R/content
What causes this border to be displayed, and how can I remove it? The intended result is that the control be transparent.
Here's the code I'm using:
NSProgressIndicator *progressIndicator = [[NSProgressIndicator alloc] init];
[progressIndicator setBezeled: NO];
[progressIndicator setStyle: NSProgressIndicatorSpinningStyle];
[progressIndicator setControlSize: NSSmallControlSize];
[progressIndicator sizeToFit];
[progressIndicator startAnimation: self];
[statusItem setView: progressIndicator]; // statusItem is an NSStatusItem instance
...
[statusItem setView: nil];
[progressIndicator stopAnimation: self];
[progressIndicator release];
Don’t scale the NSProgressIndicator though it’s also an NSView. Create a new view that resizes fine, position the status indicator in that view, and pass the enclosing view to -[NSStatusItem setView:]. Here is my implementation.
In NSStatusItem+AnimatedProgressIndicator.m,
- (void) startAnimation {
NSView *progressIndicatorHolder = [[NSView alloc] init];
NSProgressIndicator *progressIndicator = [[NSProgressIndicator alloc] init];
[progressIndicator setBezeled: NO];
[progressIndicator setStyle: NSProgressIndicatorSpinningStyle];
[progressIndicator setControlSize: NSSmallControlSize];
[progressIndicator sizeToFit];
[progressIndicator setUsesThreadedAnimation:YES];
[progressIndicatorHolder addSubview:progressIndicator];
[progressIndicator startAnimation:self];
[self setView:progressIndicatorHolder];
[progressIndicator center];
[progressIndicator setNextResponder:progressIndicatorHolder];
[progressIndicatorHolder setNextResponder:self];
}
- (void) stopAnimation {
[self setView:nil];
}
- (void) mouseDown:(NSEvent *) theEvent {
[self popUpStatusItemMenu:[self menu]];
}
- (void) rightMouseUp:(NSEvent *) theEvent {}
- (void) mouseUp:(NSEvent *) theEvent {}
…
I added a custom method, -[NSView center], which does the following:
@implementation NSView (Centering)
- (void) center {
if (![self superview]) return;
[self setFrame:NSMakeRect(
0.5 * ([self superview].frame.size.width - self.frame.size.width),
0.5 * ([self superview].frame.size.height - self.frame.size.height),
self.frame.size.width,
self.frame.size.height
)];
}
@end
I've seen you solved the problem I will leave this is an alternative to your implementation. You can use ProgressHud.
来源：https://stackoverflow.com/questions/2714951/what-causes-a-white-border-to-be-applied-to-an-nsprogressindicator-displayed-in