Use color with alpha fill NSView?
I write a window and two views,
set background color of window to blue,
and draw a image in view1,
and fill view2 with a color with alpha,like this:
//AppDelegate
[self.window setLevel:(NSStatusWindowLevel + 2)];
TestView *view1 = [[TestView alloc] initWithFrame:NSMakeRect(0, 0, self.window.frame.size.width, self.window.frame.size.height)];
TestView2 *view2 = [[TestView2 alloc] initWithFrame:NSMakeRect(0, 0, self.window.frame.size.width, self.window.frame.size.height)];
[self.window setContentView:view1];
[self.window.contentView addSubview:view2];
//View1
- (void)drawRect:(NSRect)dirtyRect {
[super drawRect:dirtyRect];
// Drawing code here.
NSImage *image = [NSImage imageNamed:@"testImage"];
[image drawInRect:dirtyRect];
}
//view2
- (void)drawRect:(NSRect)dirtyRect {
[super drawRect:dirtyRect];
// Drawing code here.
[[[NSColor redColor] colorWithAlphaComponent:0.5] set];
NSRectFill(dirtyRect);
}
But when the app run, I found I the backgroundcolor of window and image of View1 did not show, only the view2 show, and it is transparent,through it can see the desktop.
If I did not add subview view2, the app runs correctly, the blue background color and the image.
Does anybody know why, really thanks for the help, I will wait on line.
objective-c macos nsview
edited Nov 13 '18 at 7:23
Sangram S.
2,53121632
asked Jun 6 '16 at 8:12
melody5417melody5417
13310
add a comment |
I write a window and two views,
set background color of window to blue,
and draw a image in view1,
and fill view2 with a color with alpha,like this:
//AppDelegate
[self.window setLevel:(NSStatusWindowLevel + 2)];
TestView *view1 = [[TestView alloc] initWithFrame:NSMakeRect(0, 0, self.window.frame.size.width, self.window.frame.size.height)];
TestView2 *view2 = [[TestView2 alloc] initWithFrame:NSMakeRect(0, 0, self.window.frame.size.width, self.window.frame.size.height)];
[self.window setContentView:view1];
[self.window.contentView addSubview:view2];
//View1
- (void)drawRect:(NSRect)dirtyRect {
[super drawRect:dirtyRect];
// Drawing code here.
NSImage *image = [NSImage imageNamed:@"testImage"];
[image drawInRect:dirtyRect];
}
//view2
- (void)drawRect:(NSRect)dirtyRect {
[super drawRect:dirtyRect];
// Drawing code here.
[[[NSColor redColor] colorWithAlphaComponent:0.5] set];
NSRectFill(dirtyRect);
}
But when the app run, I found I the backgroundcolor of window and image of View1 did not show, only the view2 show, and it is transparent,through it can see the desktop.
If I did not add subview view2, the app runs correctly, the blue background color and the image.
Does anybody know why, really thanks for the help, I will wait on line.
objective-c macos nsview
edited Nov 13 '18 at 7:23
Sangram S.
2,53121632
asked Jun 6 '16 at 8:12
melody5417melody5417
13310
add a comment |
I write a window and two views,
set background color of window to blue,
and draw a image in view1,
and fill view2 with a color with alpha,like this:
//AppDelegate
[self.window setLevel:(NSStatusWindowLevel + 2)];
TestView *view1 = [[TestView alloc] initWithFrame:NSMakeRect(0, 0, self.window.frame.size.width, self.window.frame.size.height)];
TestView2 *view2 = [[TestView2 alloc] initWithFrame:NSMakeRect(0, 0, self.window.frame.size.width, self.window.frame.size.height)];
[self.window setContentView:view1];
[self.window.contentView addSubview:view2];
//View1
- (void)drawRect:(NSRect)dirtyRect {
[super drawRect:dirtyRect];
// Drawing code here.
NSImage *image = [NSImage imageNamed:@"testImage"];
[image drawInRect:dirtyRect];
}
//view2
- (void)drawRect:(NSRect)dirtyRect {
[super drawRect:dirtyRect];
// Drawing code here.
[[[NSColor redColor] colorWithAlphaComponent:0.5] set];
NSRectFill(dirtyRect);
}
But when the app run, I found I the backgroundcolor of window and image of View1 did not show, only the view2 show, and it is transparent,through it can see the desktop.
If I did not add subview view2, the app runs correctly, the blue background color and the image.
Does anybody know why, really thanks for the help, I will wait on line.
objective-c macos nsview
edited Nov 13 '18 at 7:23
Sangram S.
2,53121632
asked Jun 6 '16 at 8:12
melody5417melody5417
13310
I write a window and two views,
set background color of window to blue,
and draw a image in view1,
and fill view2 with a color with alpha,like this:
//AppDelegate
[self.window setLevel:(NSStatusWindowLevel + 2)];
TestView *view1 = [[TestView alloc] initWithFrame:NSMakeRect(0, 0, self.window.frame.size.width, self.window.frame.size.height)];
TestView2 *view2 = [[TestView2 alloc] initWithFrame:NSMakeRect(0, 0, self.window.frame.size.width, self.window.frame.size.height)];
[self.window setContentView:view1];
[self.window.contentView addSubview:view2];
//View1
- (void)drawRect:(NSRect)dirtyRect {
[super drawRect:dirtyRect];
// Drawing code here.
NSImage *image = [NSImage imageNamed:@"testImage"];
[image drawInRect:dirtyRect];
}
//view2
- (void)drawRect:(NSRect)dirtyRect {
[super drawRect:dirtyRect];
// Drawing code here.
[[[NSColor redColor] colorWithAlphaComponent:0.5] set];
NSRectFill(dirtyRect);
}
But when the app run, I found I the backgroundcolor of window and image of View1 did not show, only the view2 show, and it is transparent,through it can see the desktop.
If I did not add subview view2, the app runs correctly, the blue background color and the image.
Does anybody know why, really thanks for the help, I will wait on line.
objective-c macos nsview
objective-c macos nsview
edited Nov 13 '18 at 7:23
Sangram S.
2,53121632
asked Jun 6 '16 at 8:12
melody5417melody5417
13310
edited Nov 13 '18 at 7:23
Sangram S.
2,53121632
asked Jun 6 '16 at 8:12
melody5417melody5417
13310
edited Nov 13 '18 at 7:23
Sangram S.
2,53121632
edited Nov 13 '18 at 7:23
Sangram S.
2,53121632
edited Nov 13 '18 at 7:23
Sangram S.
2,53121632
2,53121632
asked Jun 6 '16 at 8:12
melody5417melody5417
13310
asked Jun 6 '16 at 8:12
melody5417melody5417
13310
asked Jun 6 '16 at 8:12
melody5417melody5417
13310
13310
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
I change the NSRectFill to
NSRectFillUsingOperation(dirtyRect, NSCompositeSourceOver);
Then it turns right.
answered Jun 6 '16 at 8:41
melody5417melody5417
13310
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
I change the NSRectFill to
NSRectFillUsingOperation(dirtyRect, NSCompositeSourceOver);
Then it turns right.
answered Jun 6 '16 at 8:41
melody5417melody5417
13310
add a comment |
I change the NSRectFill to
NSRectFillUsingOperation(dirtyRect, NSCompositeSourceOver);
Then it turns right.
answered Jun 6 '16 at 8:41
melody5417melody5417
13310
add a comment |
I change the NSRectFill to
NSRectFillUsingOperation(dirtyRect, NSCompositeSourceOver);
Then it turns right.
answered Jun 6 '16 at 8:41
melody5417melody5417
13310
I change the NSRectFill to
NSRectFillUsingOperation(dirtyRect, NSCompositeSourceOver);
Then it turns right.
answered Jun 6 '16 at 8:41
melody5417melody5417
13310
answered Jun 6 '16 at 8:41
melody5417melody5417
13310
answered Jun 6 '16 at 8:41
melody5417melody5417
13310
answered Jun 6 '16 at 8:41
melody5417melody5417
13310
13310
add a comment |
add a comment |
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