单击开关时程序崩溃?

发布于 2024-09-19 07:52:24 字数 3142 浏览 6 评论 0原文

这是我的老问题 链接

我之前问过一个问题,但是我把答案放在我的代码中它可以编译没有错误

但是当我单击开关时,程序崩溃

我只想单击开关,而不是返回我单击的

行是我的代码

首先我创建一个 LightTableViewController.h/.m

然后在 LightCell0.h 中创建 LightCell0.h/.m

@interface LightCell0 : UITableViewCell { 
 UILabel     *lightLocation;
 UIImageView *lightImageView;
 UISwitch    *lightSwitch;   
}

@property(nonatomic,retain) UILabel *lightLocation;
@property(nonatomic,retain) UIImageView *lightImageView;
@property(nonatomic,retain) UISwitch *lightSwitch;

- (void)switchlightswitch:(id)sender;

我需要每个单元格将是图像,文本标签,

LightCell.m

- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier {
 if ((self = [super initWithStyle:style reuseIdentifier:reuseIdentifier])) {
  lightLocation = [[UILabel alloc]init];
  lightLocation.textAlignment = UITextAlignmentLeft;
  lightLocation.font = [UIFont boldSystemFontOfSize:20];
  lightLocation.backgroundColor = [UIColor blackColor];
  lightLocation.textColor =[UIColor whiteColor];

  lightImageView = [[UIImageView alloc]init];

  lightSwitch = [[UISwitch alloc]init];

  [self.contentView addSubview:lightLocation];
  [self.contentView addSubview:lightImageView];
  [self.contentView addSubview:lightSwitch];

  [lightSwitch addTarget:self action:@selector(switchlightswitch:) forControlEvents:UIControlEventValueChanged];

  // Initialization code

    }
    return self;
}

切换- (void)switchlightswitch:(id)sender{

 if (lightSwitch.on){
  lightImageView.image = [UIImage imageNamed:@"lightOn.png"];
 }
 else {
  lightImageView.image = [UIImage imageNamed:@"lightOff.png"]; 

} 到目前为止

- (void)layoutSubviews {

 [super layoutSubviews];
 CGRect contentRect = self.contentView.bounds;
 CGFloat boundsX = contentRect.origin.x;
 CGRect frame;
 frame = CGRectMake(boundsX+10 ,0, 44, 44);
 lightImageView.frame = frame;
 frame = CGRectMake(boundsX+60 ,3, 150, 44);
 lightLocation.frame = frame;
 frame = CGRectMake(boundsX+220, 10,0,0);
 lightSwitch.frame = frame ;

}

,当我改变开关状态时,程序可以响应,它也会改变图像。

但如果我把这段代码放进去,我可以编译,而不是如果我触摸任何开关就会崩溃

[lightSwitch addTarget:self action:@selector(switchToggled:) forControlEvents:UIControlEventValueChanged];

并给出一个无效的

- (void)switchToggled:(id)sender {
 UISwitch *theSwitch = (UISwitch *)sender;
    UITableViewCell *cell = (UITableViewCell *)theSwitch.superview;
    UITableView *tableView = (UITableView *)cell.superview;
    NSIndexPath *indexPath = [tableView indexPathForCell:cell];
    if(theSwitch.on) {
  NSLog(@"You Switch On the NodeID:%i ",indexPath.row);
    }
    else {
  NSLog(@"You Switch Off the NodeID:%i ",indexPath.row);
    }
}

崩溃消息是“由于未捕获的异常'NSInvalidArgumentException'而终止应用程序,原因:'*** -[LightCell0 indexPathForCell:]:无法识别的选择器发送到实例

有人知道发生了什么吗继续我的代码?

Here is my old question Link

I ask a question before,But I put the answer in my code It can compiler without error

But when I click the switch ,the program crash

I just want to click the switch ,than return which row I click

Here is my code

First I create a LightTableViewController.h/.m

Than I create LightCell0.h/.m

in LightCell0.h

@interface LightCell0 : UITableViewCell { 
 UILabel     *lightLocation;
 UIImageView *lightImageView;
 UISwitch    *lightSwitch;   
}

@property(nonatomic,retain) UILabel *lightLocation;
@property(nonatomic,retain) UIImageView *lightImageView;
@property(nonatomic,retain) UISwitch *lightSwitch;

- (void)switchlightswitch:(id)sender;

I need each cell will be an image ,Textlabel ,switch inside

In LightCell.m

- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier {
 if ((self = [super initWithStyle:style reuseIdentifier:reuseIdentifier])) {
  lightLocation = [[UILabel alloc]init];
  lightLocation.textAlignment = UITextAlignmentLeft;
  lightLocation.font = [UIFont boldSystemFontOfSize:20];
  lightLocation.backgroundColor = [UIColor blackColor];
  lightLocation.textColor =[UIColor whiteColor];

  lightImageView = [[UIImageView alloc]init];

  lightSwitch = [[UISwitch alloc]init];

  [self.contentView addSubview:lightLocation];
  [self.contentView addSubview:lightImageView];
  [self.contentView addSubview:lightSwitch];

  [lightSwitch addTarget:self action:@selector(switchlightswitch:) forControlEvents:UIControlEventValueChanged];

  // Initialization code

    }
    return self;
}

- (void)switchlightswitch:(id)sender{

 if (lightSwitch.on){
  lightImageView.image = [UIImage imageNamed:@"lightOn.png"];
 }
 else {
  lightImageView.image = [UIImage imageNamed:@"lightOff.png"]; 

}
}

- (void)layoutSubviews {

 [super layoutSubviews];
 CGRect contentRect = self.contentView.bounds;
 CGFloat boundsX = contentRect.origin.x;
 CGRect frame;
 frame = CGRectMake(boundsX+10 ,0, 44, 44);
 lightImageView.frame = frame;
 frame = CGRectMake(boundsX+60 ,3, 150, 44);
 lightLocation.frame = frame;
 frame = CGRectMake(boundsX+220, 10,0,0);
 lightSwitch.frame = frame ;

}

So far,the program can response when i change the switch status ,it will also change the image.

but if I put this code in ,i can compiler ,than crash if I touch any switch

[lightSwitch addTarget:self action:@selector(switchToggled:) forControlEvents:UIControlEventValueChanged];

and give a void

- (void)switchToggled:(id)sender {
 UISwitch *theSwitch = (UISwitch *)sender;
    UITableViewCell *cell = (UITableViewCell *)theSwitch.superview;
    UITableView *tableView = (UITableView *)cell.superview;
    NSIndexPath *indexPath = [tableView indexPathForCell:cell];
    if(theSwitch.on) {
  NSLog(@"You Switch On the NodeID:%i ",indexPath.row);
    }
    else {
  NSLog(@"You Switch Off the NodeID:%i ",indexPath.row);
    }
}

the crash message is "Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[LightCell0 indexPathForCell:]: unrecognized selector sent to instance"

does anyone knows what's going on with my code ?

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评论(3

一瞬间的火花 2024-09-26 07:52:24

从错误消息来看,我怀疑您的转换是错误的:

UITableViewCell *cell = (UITableViewCell *)theSwitch.superview;
UITableView *tableView = (UITableView *)cell.superview;

Are you certain that theSwitch is a UITableViewCell and the super view of the cell is the UITableView.崩溃告诉您您所尊重的 tableView 对象是 LightCell0 对象

From the error message, I suspect your cast is wrong:

UITableViewCell *cell = (UITableViewCell *)theSwitch.superview;
UITableView *tableView = (UITableView *)cell.superview;

Are you sure that the superview of theSwitch is a UITableViewCell and the super view of the cell is the UITableView. The crash tell you that the tableView object that you respect is a LightCell0 object

无法回应 2024-09-26 07:52:24

为了获取开关的状态,您正在使用“yourSwitch.on”,我认为这是不正确的。
将其更改为 [yourSwitch isOn] 并测试您的应用。
我在您的代码中看到两个语句,您正在其中检查开关的状态。改变它们并尝试。

For getting the status of the switch, you are using "yourSwitch.on", which I don't think is correct.
Chang it to [yourSwitch isOn] and test your app.
I see 2 statements in your code where you are checking the state of a switch. Change them and try.

清风不识月 2024-09-26 07:52:24

我已经找到答案了!
theSwitch.superview实际上返回UITableViewCell内的contentView。
所以你应该改为:

UITableViewCell *cell = (UITableViewCell *)theSwitch.superview.superview;

I have found the answer!
theSwitch.superview actually returns the contentView inside UITableViewCell.
So you should change to:

UITableViewCell *cell = (UITableViewCell *)theSwitch.superview.superview;
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