我想在可可MAC应用程序开发中交换视图,比如UINavigationController,用于cocoa touch中的推送/弹出视图。 这是应用程序对推送和弹出视图的要求,不知怎的,我可以设法实现这一点,但现在我在项目的中间,我想要像可可中的viewWillAppear。
答案 0 :(得分:2)
仅供参考,iOS OS生命周期方法(viewDidLoad,viewWillAppear,viewDidAppear等)自OSX 10.10 Yosemite(可能还有以后)开始提供。
并提醒注意:如果您计划在10.10 OSX版本之前运行应用程序,请不要实现此类方法,因为早期版本无法识别这些方法(因此不会执行其中的代码)
答案 1 :(得分:1)
这种方法在Mac上不可用。与iOS UI相比,OSX UI非常不同。 使用 - (void)loadView进行初始UI更新(或 - (void)awakeFromNib如果您的UI是在Interface Builder中设计并从xib文件加载),之后以编程方式进行特定的按需UI更新请求,无论何时调用showWindow,makeKeyAndOrderFront,获取通知,从代理获取回调等。
答案 2 :(得分:1)
我想出了这样的事情:
HEADER:
@protocol GWViewExtensions <NSObject>
- (void) viewWasAddedToSuperview;
@end
@interface GWView : NSView
//set to the view controller managing this view to get NSResponder udpates,
//and GWViewExtension protocol method calls.
@property (weak,nonatomic) IBOutlet NSViewController * viewController;
@end
实现:
#import "GWView.h"
@implementation GWView
- (void) awakeFromNib {
[self setNeedsDisplay:TRUE];
}
- (void) addSubview:(NSView *)aView {
[super addSubview:aView];
if([aView isMemberOfClass:[GWView class]]) {
GWView * gview = (GWView *)aView;
if(gview.viewController && [gview.viewController conformsToProtocol:@protocol(GWViewExtensions)]) {
if([gview.viewController respondsToSelector:@selector(viewWasAddedToSuperview)]) {
[gview.viewController performSelectorOnMainThread:@selector(viewWasAddedToSuperview) withObject:nil waitUntilDone:FALSE];
}
}
}
}
- (void) setViewController:(NSViewController *) newController {
if(_viewController) {
NSResponder *controllerNextResponder = [_viewController nextResponder];
[super setNextResponder:controllerNextResponder];
[_viewController setNextResponder:nil];
}
_viewController = newController;
if(newController) {
NSResponder *ownNextResponder = [self nextResponder];
[super setNextResponder:_viewController];
[_viewController setNextResponder:ownNextResponder];
}
}
- (void)setNextResponder:(NSResponder *)newNextResponder {
if(self.viewController) {
[self.viewController setNextResponder:newNextResponder];
return;
}
[super setNextResponder:newNextResponder];
}
- (void) setBackgroundColor:(NSColor *)backgroundColor {
_backgroundColor = backgroundColor;
[self setNeedsDisplay:TRUE];
}
- (void) drawRect:(NSRect) dirtyRect {
[super drawRect:dirtyRect];
if(self.backgroundColor) {
NSGraphicsContext * theContext = [NSGraphicsContext currentContext];
[theContext saveGraphicsState];
[[NSGraphicsContext currentContext] setPatternPhase:NSMakePoint(0,[self frame].size.height)];
[self.backgroundColor set];
NSRectFill([self bounds]);
[theContext restoreGraphicsState];
}
}
- (void) dealloc {
self.backgroundColor = nil;
}
@end
使用:
#import <Cocoa/Cocoa.h>
#import "GWView.h"
@interface GWDribbbleShotDetailColumn : NSViewController <GWViewExtensions>
@end
#import "GWDribbbleShotDetailColumn.h"
@interface GWDribbbleShotDetailColumn ()
@end
@implementation GWDribbbleShotDetailColumn
- (void) viewWasAddedToSuperview {
NSRect svb = self.view.superview.bounds;
NSRect sf = self.view.frame;
sf.size.height = NSHeight(svb);
sf.size.width = NSWidth(svb);
self.view.frame = sf;
}
@end
答案 3 :(得分:0)
我使用NSViewController的特殊视图,它调用视图控制器。 您可以扩展代码以使用viewWillAppear等方法。
- (void)viewWillMoveToWindow:(NSWindow *)newWindow {
[super viewWillMoveToWindow:newWindow];
if (self.installed && !newWindow) {
[self viewWillUninstall];
NSViewController<SMControllerViewDelegate> *viewController = self.viewController;
if (viewController) {
@autoreleasepool {
[viewController viewWillUninstall];
}
}
}
}
- (void)viewDidMoveToWindow {
[super viewDidMoveToWindow];
if (!self.installed && self.window) {
[self viewDidInstall];
NSViewController<SMControllerViewDelegate> *viewController = self.viewController;
if (viewController) {
@autoreleasepool {
[viewController viewDidInstall];
}
}
}
}
答案 4 :(得分:-1)
我已经使用NSViewController来改变视图,就像在按钮点击窗口上设置viewController一样根据需要,但我发现一旦(id)init被调用特定的viewController,它再也不会再调用同一个viewController。出于这个原因,我的UI(View / MVC)没有更新。我再次强行调用(id)init,但视图没有刷新。