objective-c - 此类与键PerformRotate的键值编码不兼容

我是编程新手，我正在使用Xcode编写非常简单的动画。

这是我的BuildingViewController.h:

#import <UIKit/UIKit.h>

@interface BuildingViewController : UIViewController {

}
@property (nonatomic, retain) IBOutlet UIButton * buttonTarget;

- (IBAction)performRotate:(id)sender;
//- (void)setValue:(id)value forKey:(NSString *)performRotate;

@end

这是我的BuildingViewController.m

import "BuildingViewController.h"

@interface BuildingViewController ()

@end

@implementation BuildingViewController

//@synthesize image;


- (void)viewDidLoad
{
//    [image setAlpha:0];
//  [self startAnimation];
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (IBAction)performRotate:(id)sender {

    [UIView animateWithDuration:1.0 animations:^{
    CGAffineTransform previousTransformation = self.buttonTarget.transform;
    CGAffineTransform newRotationTransformation = CGAffineTransformMakeRotation(90.0f * (M_PI / 180.0f));
    CGAffineTransform newTransformation = CGAffineTransformConcat(previousTransformation, newRotationTransformation);
    self.buttonTarget.transform = newTransformation;
}];

}

@end

我得到的错误看起来像这样:

2012-10-11 10:08:47.676 graphics1 [27608:c07] *由于未捕获的异常'NSUnknownKeyException'而终止应用程序，原因:'[setValue:forUndefinedKey:]:此类不是键值编码兼容的键PerformRotate。”
* 首先抛出调用堆栈:
(0x1c8e012 0x10cbe7e 0x1d16fb1 0xb78711 0xaf9ec8 0xaf99b7 0xb24428 0x2300cc 0x10df663 0x1c8945a 0x22ebcf 0xf3e37 0xf4418 0xf4648 0xf4882 0x43a25 0x43dbf 0x43f55 0x4cf67 0x10fcc 0x11fab 0x23315 0x2424b 0x15cf8 0x1be9df9 0x1be9ad0 0x1c03bf5 0x1c03962 0x1c34bb6 0x1c33f44 0x1c33e1b 0x117da 0x1365c 0x259d 0x24c5)
libc ++ abi.dylib:终止调用引发异常

我是否需要篡改BuildingAppDelegate.h或.m？

最佳答案

检查您的XIB / Storyboard。可能是您的- (IBAction)performRotate:(id)sender方法最初名为- (IBAction)PerformRotate:(id)sender，后者是IB中连接的方法。更改方法名称时，必须在XIB / Storyboard中重新连接它，否则它将调用您的旧方法，该方法不再存在。