Objective c 如何在Mac上以编程方式移动接口对象？

所以我有一些NSButton和NSImage（我想它们会以相同的方式移动），我想移动它们。我想把它们移到窗口上的新坐标。我假设我可以在Interface Builder上计算出要将它们移动到的坐标，然后以编程方式移动它们

此外，如何设置此运动的动画？控制动画的速度、风格等等？有内置的功能吗？还是我必须制作图像文件并循环浏览

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注意：我主要想知道如何更改对象的坐标，动画是次要的，但如果您也能描述一下，我会非常高兴。

每个UI元素都有一个边界和帧属性。frame属性具有x、y、width和height属性。如果要四处移动项目，只需调整框架特性的值：

NSButton *button // assume this exists as your UI object
NSRect rect = NSMakeRect(50.0, 40.0, 250.0, 100.0);
[button setFrame:rect];

这将在没有任何动画的情况下移动它。如果需要动画，请通过对象的动画代理（适用于简单内容：

[[button animation] setFrame:rect];

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你可以使用核心动画来实现这一点：

更新：我最初的帖子是关于如何在iPhone上制作两个矩形的动画，但这不是最初的海报/问题所问的。这就是我在24小时的编码后试图回答SO问题所得到的结果。不管怎样，我将把这个答案留在这里，以防有人来学习关于iPhone上的这一点。下面是一个在Mac上执行完全相同操作的示例。请注意，此示例要求您首先在Interface Builder中使用NSWindow设置一个示例项目（任何默认项目都应该这样做）：

------Mac示例：

// MacAnimationExample.h:

#import <Cocoa/Cocoa.h>
#import <QuartzCore/QuartzCore.h>

@interface ColorView : NSView {
    NSColor             *backgroundColor;
}

@property( nonatomic, retain ) NSColor      *backgroundColor;

@end


@interface MacAnimationExample : NSObject <NSAnimationDelegate, NSApplicationDelegate> {
    ColorView           *red;
    ColorView           *yellow;

    IBOutlet NSWindow   *window;
}

@property( assign ) IBOutlet NSWindow *window;

@end


// MacAnimationExample.m:

#import "MacAnimationExample.h"

@implementation ColorView

@synthesize backgroundColor;

- (void) setBackgroundColor:(NSColor *) iColor {
    [iColor retain];
    [backgroundColor release];
    backgroundColor = iColor;

    [self setNeedsDisplay: YES];
}

- (void) drawRect:(NSRect) iRect {
    [backgroundColor set];
    NSRectFill( iRect );
}

@end


@implementation MacAnimationExample

@synthesize window;

- (void) animateIt {
    NSAnimation                 *animation;
    NSArray                     *animations;
    NSRect                      redFrame, yellowFrame;
    NSMutableDictionary         *redInfo, *yellowInfo;

    redFrame = [red frame];
    yellowFrame = [yellow frame];

    redInfo = [NSMutableDictionary dictionary];

    [redInfo setObject: red forKey: NSViewAnimationTargetKey];
    [redInfo setObject: [NSValue valueWithRect: redFrame] forKey: NSViewAnimationStartFrameKey];
    [redInfo setObject: [NSValue valueWithRect: yellowFrame] forKey: NSViewAnimationEndFrameKey];

    yellowInfo = [NSMutableDictionary dictionary];

    [yellowInfo setObject: yellow forKey: NSViewAnimationTargetKey];
    [yellowInfo setObject: [NSValue valueWithRect: yellowFrame] forKey: NSViewAnimationStartFrameKey];
    [yellowInfo setObject: [NSValue valueWithRect: redFrame] forKey: NSViewAnimationEndFrameKey];

    animations = [NSArray arrayWithObjects: redInfo, yellowInfo, nil];

    animation = [[[NSViewAnimation alloc] initWithViewAnimations: animations] autorelease];
    [animation setDelegate: self];
    [animation setDuration: 0.5];
    [animation startAnimation];
}

- (void) animationDidEnd:(NSAnimation*) animation {
    [self animateIt];
}

- (void) applicationDidFinishLaunching:(NSNotification *) aNotification {
    NSRect                      bounds;
    NSView                      *contentView;

    contentView = [window contentView];

    bounds = [contentView bounds];
    bounds.size.width = floorf( bounds.size.width * 0.5 );
    red = [[[ColorView alloc] initWithFrame: bounds] autorelease];
    red.backgroundColor = [NSColor redColor];
    [contentView addSubview: red];

    bounds.origin.x += bounds.size.width;
    yellow = [[[ColorView alloc] initWithFrame: bounds] autorelease];
    yellow.backgroundColor = [NSColor yellowColor];
    [contentView addSubview: yellow];

    [self animateIt];
}

@end

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我假设动画不是字面上所使用的方法，你有一个具体的例子吗？哦，好吧，这是animator，不是animation，太棒了。对不起，是的，我在没有实际编译的情况下键入了这个。想法是，对于简单的动画，你不需要直接处理核心动画。相反，你可以询问NSView（或其子类）对于动画代理。代理会传递您想要发送的消息，但它允许您对其进行动画处理，而不仅仅是移动。谢谢，这篇文章很棒。问题是关于mac开发的。不是iPhone。嗯，是的。我的NS和UI看起来很混乱。我会去看看如何为mac编写同样的内容。问题很有趣g、 但请不要在你打算让我使用的应用程序中这样做。移动按钮是UI的噩梦。

@interface ExampleViewController : UIViewController {
    UIView                  *red;
    UIView                  *yellow;
}

@end

@implementation ExampleViewController

- (void) loadView {
    UIView          *background;
    CGRect          frame;

    frame = [UIScreen mainScreen].bounds;

    // background view contains red & yellow subviews
    background = [[[UIView alloc] initWithFrame: frame] autorelease];

    frame.size.width = floorf( frame.size.width * 0.5 );
    red = [[[UIView alloc] initWithFrame: frame] autorelease];
    red.backgroundColor = [UIColor redColor];

    frame.origin.x = frame.size.width;
    yellow = [[[UIView alloc] initWithFrame: frame] autorelease];
    yellow.backgroundColor = [UIColor yellowColor];

    [background addSubview: yellow];
    [background addSubview: red];

    self.view = background; 
}

- (void) viewWillAppear:(BOOL) animated {
    CGRect              temp;

    // normally you will let the animated parameter
    // control whether or not the view animates.  for
    // demonstation I add a hack to force animation to begin:
    animated = YES; // hack

    if ( animated ) {
        [UIView beginAnimations: nil context: nil];
        [UIView setAnimationDelegate: self];
        [UIView setAnimationDidStopSelector: @selector(startAnimation)];
        [UIView setAnimationDuration: 0.5];
    }

    temp = red.frame;
    red.frame = yellow.frame;
    yellow.frame = temp;

    if ( animated ) [UIView commitAnimations];
}

- (void) startAnimation {
    [self viewWillAppear: YES];
}

@end