相关疑难解决方法(0)

我该怎么用NSRunningApplication？我有一个与启动应用程序相反的东西:

[[NSWorkspace sharedWorkspace] launchApplication:appName];

但我想关闭一个.我在调试代码时遇到错误NSRunningApp:

NSRunningApplication *selectedApp = appName;
[selectedApp terminate];

有什么不对？如果有,请指出它以及如何解决它.

我一直收到这个错误:

alt text http://img514.imageshack.us/img514/2203/help.tif

它是什么？我甚至从未调用过"isEqualToString".

这是我的笑话.M

@implementation Joke
@synthesize joke;
@synthesize rating;


- (id)init {
[super init];
return self;
 }

- (void)dealloc {
[joke release];
[super dealloc];    
}

+ (id)jokeWithValue:(NSString *)joke {
Joke *j = [[Joke alloc] init];
j.joke = joke;
return [j autorelease];
}

@end

这是joke.h

@interface Joke : NSObject {
NSString *joke;
int rating;
}

+ (id)jokeWithValue:(NSString *)joke;

@property (readwrite, copy) NSString *joke;
@property (readwrite) int rating;

@end

这里是玩笑的地方

#import "TableViewController.h"
#import "Joke.h"

@implementation TableViewController
@synthesize jokes;

- …