NSCursor:& quot; set&"方法无效 [英] NSCursor: "set" method has no effect

问题描述

我正在使用Xcode(使用cocos2d)在Mac应用程序上工作，尝试配置光标，并且"set"方法在某些情况下似乎没有任何作用...

I am working on a Mac application with Xcode (using cocos2d), trying to configure the cursor, and the "set" method does not seem to have any effect in some cases...

在启动应用程序时，我已经很难设置光标了(在应用程序真正启动后，NSTimer对其进行了设置)，现在，我只希望它在用户单击时显示另一个图像.我为此使用NSNotification，我的光标类收到通知，然后应该设置新图像，然后...什么都没有.

I already had a hard time to set my cursor at the launch of the application (NSTimer to set it after the application was really launched), and now I just want it to display another image when the user clicks; I use NSNotification for that, my cursor class receives the notification, then it is supposed to set the new image, then... nothing.

以下一些代码可能会有所帮助:

Here is some code which may help:

-(void) click  
{  
    CCLOG(@"Click");  
    NSString *path = [[NSBundle mainBundle] pathForResource:@"point_pressed" ofType:@"png"];  
    NSImage *cursorImage = [[[NSImage alloc] initByReferencingFile:path] autorelease];  
    NSCursor *cursor = [[NSCursor alloc] initWithImage:cursorImage hotSpot:[[NSCursor currentCursor] hotSpot]];  
    [cursor set];  
}  

在初始化中:

    [NSTimer scheduledTimerWithTimeInterval:0.1f target:self selector:@selector(updateCursor:) userInfo:nil repeats:NO];  

方法:

-(void) updateCursor:(id)sender  
{  
    CCLOG(@"Update cursor");  
    [[self.cursorsDict objectForKey:@"point"] set];  
}  

当应用程序处于活动状态时，也会调用"updateCursor"方法，然后它可以正常工作，并显示正确的光标.
我尝试了很多东西，弹出和推入方法，"setOnMouseEnter"(尽管我还没有使用rect)，但是没有结果...
有人对此有任何线索吗?

The "updateCursor" method is also called when the application becomes active, and then it works fine, the correct cursor is displayed.
I have tried many things, pop and push methods, "setOnMouseEnter" (although I don't use rect yet), but no result...
Has anyone a clue about this?

陌生人，我写了appWake方法:

Stranger, I wrote the appWake method:

-(void) appWake
{
    int i = rand()%3;
    if(i==0)
        [[self.cursorsDict objectForKey:@"point"] set];
    else if(i==1)
        [[self.cursorsDict objectForKey:@"point_pressed"] set];
    else if(i==2)
        [[self.cursorsDict objectForKey:@"open"] set];
    self.state = ECursorState_Point;
    [NSTimer scheduledTimerWithTimeInterval:0.5f target:self selector:@selector(appWake) userInfo:nil repeats:NO];
}

通过通知呼叫哪个:

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(appWake) name:EVENT_APPLICATION_DID_BECOME_ACTIVE object:nil];

在appDelegate中设置的方式:

Set in the appDelegate by:

-(void) applicationDidBecomeActive:(NSNotification *)notification
{
    [[NSNotificationCenter defaultCenter] postNotificationName:EVENT_APPLICATION_DID_BECOME_ACTIVE object:nil];
}

当此通知调用它时，它可以正常工作，光标会随机变化；但是，如果我在applicationDidBecomeActive中删除了通知，并在代码中的其他地方调用了它，那么它什么也不会做(尽管我检查了它是否被调用)...

And when it's called by this notification, it works fine, the cursor changes randomly; but if I remove the notification in applicationDidBecomeActive and call it somewhere else in my code, then it does not do anything (although I checked that it is called)...

推荐答案

我知道已经有一段时间了.但是我有一个类似的问题.

I know it has been awhile. But I had a similar problem.

由于某些原因，从应用程序事件中调用[cursor set]无效.

For some reason [cursor set] doesn't work when being called from the application events.

这是我的做法:

- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
    [self performSelector:@selector(doChangeCursor) withObject:nil afterDelay:1];
}

- (void) doChangeCursor
{
    NSString *file = [[NSBundle mainBundle] pathForResource:@"statusBarImage" ofType:@"tiff"];
    NSImage *image = [[NSImage alloc] initWithContentsOfFile:file];
    NSCursor *cursor = [[NSCursor alloc] initWithImage:image hotSpot:NSMakePoint(0, 0)];
    [cursor set];    
}

我希望这可以帮助某人.

I hope this is able to help someone.

这篇关于NSCursor:& quot; set&"方法无效的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！