眼束(&N)

// myClass.h
#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>

@interface myClass : NSObject {
    UIImage *image;
}
@property (readonly) UIImage *image;
- (id)initWithIndex:(NSUInteger)aIndex;
@end


// myClass.m
#import "myClass.m"

@implementation myClass

@synthesize image;

- (id)init {
    return [self initWithIndex:0];
}

- (id)initWithIndex:(NSUInteger)aIndex {
    if ((self = [super init])) {
        NSString *name = [[NSString alloc] initWithFormat:@"image_%i", aIndex];
        NSString *path = [[NSBundle mainBundle] pathForResource:name ofType:@"png"];
        image = [[UIImage alloc] initWithContentsOfFile:path];
        if (nil == image) {
            @throw [NSException exceptionWithName:@"imageNotFound"
                reason:[NSString stringWithFormat:@"Image (%@) with path \"%@\" for current index (%i) wasn't found.",
                    [name autorelease], path, aIndex]
                userInfo:nil];
        }
        [name release];
    }
    return self;
}

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

@end

以及我的单元测试(LogicTests目标):

// myLogic.m
#import <SenTestingKit/SenTestingKit.h>
#import <UIKit/UIKit.h>
#import "myClass.h"

@interface myLogic : SenTestCase {
}
- (void)testTemp;
@end

@implementation myLogic

- (void)testTemp {
    STAssertNoThrow([[myClass alloc] initWithIndex:0], "myClass initialization error");
}

@end

所有必要的框架,“myClass.m”和图像都添加到target中。但我有一个错误:

[[myClass alloc] initWithIndex:0] raised Image (image_0) with path \"(null)\" for current index (0) wasn't found.. myClass initialization error

此代码(初始化)在应用程序本身(主目标)中运行良好,稍后将显示正确的图像。我还检查了我的项目文件夹( build/Debug-iphonesimulator/LogicTests.octest/ )-有 LogicTests Info.plist 以及必要的图像文件( image_0.png 是其中之一)。

发生了什么?