Question

我有一个定制的表，它可以获取对象和附加到该对象的名称（我最后调用HashTable），它充满了逻辑门（在Gate类下面）。我设置了HashTable四个门是开关（我知道开关实际上不是逻辑门，但在这种情况下它们是Gate的对象）。这些开关中的每一个都有一个名为switchIsOn的布尔值。我有四个UISegmentedControl s，如果值发生变化，则调用一个方法，使相应的开关switchIsOn为真（段控制索引为1）或假（索引为0）。但是，在该方法之后，布尔值会自动恢复为NO。这是代码：

HashTable标题：

#import <Foundation/Foundation.h>


@interface HashTable : NSObject 
{
}

-(void)initWithLength:(int)capacity;
-(void)add:(NSObject*)object withName:(NSString*)name;
-(id)getObjectFromIndex:(int)index;
-(id)getObjectWithName:(NSString*)name;
-(BOOL)hasObjectWithName:(NSString*)name;
-(void)removeObjectFromIndex:(int)index;
-(void)removeObjectWithName:(NSString*)name;
-(BOOL)isEmpty;
-(void)dealloc;

@end

主：

#import "HashTable.h"

@implementation HashTable

NSMutableArray* values;
NSMutableArray* markers;

-(id)initWithLength:(int)capacity
{
    self = [super init];
    if (self) 
    {
        values = [[NSMutableArray alloc] initWithCapacity:capacity];
        markers = [[NSMutableArray alloc] initWithCapacity:capacity];
    }
    return self;
}

-(void)add:(NSObject*)object withName:(NSString*)name
{
    [values addObject:object];
    [markers addObject:name];
}

-(id)getObjectFromIndex:(int)index
{
    return [values objectAtIndex:index];
}

-(id)getObjectWithName:(NSString*)name
{
    for (int i = 0; i < [markers count]; i++) 
    {
        NSString* dummy = [markers objectAtIndex:i];
        if ([[markers objectAtIndex:i] isEqualToString:name]) {return [values objectAtIndex:i];}
    }
    return @"Not found";
}

-(BOOL)hasObjectWithName:(NSString*)name
{
    for (int i = 0; i < [markers count]; i++) 
    {
        if ([[markers objectAtIndex:i] isEqualToString:name]) {return YES;}
    }
    return NO;
}

-(void)removeObjectFromIndex:(int)index
{
    [values removeObjectAtIndex:index];
    [markers removeObjectAtIndex:index];
}

-(void)removeObjectWithName:(NSString*)name
{
    for (int i = 0; i < [markers count]; i++) 
    {
        if ([[markers objectAtIndex:i] isEqualToString:name]) 
        {
            [values removeObjectAtIndex:i];
            [markers removeObjectAtIndex:i];
            return;
        }
    }
}

-(BOOL)isEmpty
{
    return [values count] == 0;
}

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

@end

和Gate类：

头：

#import <Foundation/Foundation.h>


@interface Gate : NSObject 
{
    NSString* type;
    Gate* input1;
    Gate* input2;
    BOOL oneInput;
    BOOL noInput;
    BOOL switchIsOn;
} 

-(id)initAsSWITCH;

-(void)switchOn:(BOOL)yesOrNo;

@property(nonatomic, retain) NSString* type;
@property(nonatomic, retain) Gate* input1;
@property(nonatomic, retain) Gate* input2;
@property(readwrite) BOOL oneInput;
@property(readwrite) BOOL noInput;
@property(readwrite) BOOL switchIsOn;

@end

主：

#import "Gate.h"


@implementation Gate

@synthesize type;
@synthesize input1, input2;
@synthesize oneInput, noInput, switchIsOn;

-(id)initAsSWITCH
{
    self = [super init];
    if (self) 
    {
        type = [[NSString alloc] initWithString:@"SWITCH"];
        oneInput = NO;
        noInput = YES;
        switchIsOn = NO;
    }
    return self;
}

-(void)switchOn:(BOOL)yesOrNo
{
    switchIsOn = yesOrNo;
}

-(void)dealloc
{
    [type release];
    [input1 release];
    [input2 release];
    [super dealloc];
}

@end

然后是ViewController中首先出现问题的部分：

-(IBAction)valueChanged
{
    if (switch00.selectedSegmentIndex > 0) {[[table getObjectWithName:@"S1"] switchOn:YES];}
    else {[[table getObjectWithName:@"S1"] switchOn:NO];}
    if (switch01.selectedSegmentIndex > 0) {[[table getObjectWithName:@"S2"] switchOn:YES];}
    else {[[table getObjectWithName:@"S2"] switchOn:NO];}
    if (switch10.selectedSegmentIndex > 0) {[[table getObjectWithName:@"S3"] switchOn:YES];}
    else {[[table getObjectWithName:@"S3"] switchOn:NO];}
    if (switch11.selectedSegmentIndex > 0) {[[table getObjectWithName:@"S4"] switchOn:YES];}
    else {[[table getObjectWithName:@"S4"] switchOn:NO];}
    Gate* dummy = [table getObjectWithName:@"S1"]; //These always come up as switchIsOn = NO, even though the switchOn method changes both of their booleans to YES.
    Gate* dummy2 = [table getObjectWithName:@"S2"];
}

这不是switchOn方法的问题，因为我在调试器中检查了它，它可以工作。问题出在valueChanged方法中。这是怎么回事？

编辑：在弄乱了布尔值和调试器之后，我发现布尔switchIsOn一旦踢出if then循环就会变成NO这很重要吗？

编辑：我刚尝试添加NSNumber switchValue。在开关的初始化方法中，intValue为0，如果switchOn方法的输入为YES，则它变为1。同样的问题，在方法启动后变回0。

BOOL变量的奇怪问题

0 个答案: