如何捕获自定义tableViewCell中更改的开关事件? [英] How to catch event of switch changed in custom tableViewCell?

问题描述

我有一个问题...

我有Custom TableViewCell类:

I have Custom TableViewCell class:

// Class for Custom Table View Cell.
@interface CustomTableViewCell : UITableViewCell {
    // Title of the cell.
    UILabel*     cellTitle;
    // Switch of the cell.
    UISwitch*    cellSwitch;
}

如何在我的自定义UITableViewCell中看到我具有标签和开关控制器.

How you can see in my custom UITableViewCell I have Label and Switch controller.

- (id)initWithStyle: (UITableViewCellStyle)style reuseIdentifier: (NSString *)reuseIdentifier tableType:(TableTypeEnumeration)tabletypeEnum {
        // Get Self.
        self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
        if (self) {
            // Create and initialize Title of Custom Cell.
            cellTitle = [[UILabel alloc] initWithFrame:CGRectMake(10, (44 - TAGS_TITLE_SIZE)/2, 260, 21)];
            cellTitle.backgroundColor      = [UIColor clearColor];
            cellTitle.opaque               = NO;
            cellTitle.textColor            = [UIColor blackColor];
            cellTitle.highlightedTextColor = [UIColor whiteColor];
            cellTitle.font                 = [UIFont boldSystemFontOfSize:TAGS_TITLE_SIZE];
            cellTitle.textAlignment        = UITextAlignmentLeft;
            // Create and Initialize Switch of Custom Cell.
            cellSwitch = [[UISwitch alloc] initWithFrame:CGRectMake(185, 10, 10, 10 )];

            [self.contentView addSubview:cellTitle];
            [self.contentView addSubview:cellSwitch];

            [cellTitle release];
            [cellSwitch release];
        }
        return self;
}

现在，当我在TableView中使用自定义单元格时，我想在用户更改 switch 的状态时捕获事件.我该怎么办?

Now when I use my custom cell in TableView I want to catch event when user change the state of switch. How can I do that ?

推荐答案

您必须编写值更改方法，如下所示:

You have to write method for value change as below:

[cellSwitch addTarget:self action:@selector(valueChange:) forControlEvents:UIControlEventValueChanged];

然后您必须实现委托

@protocol SwitchDelegate <NSObject>
- (void)valueChangeNotify:(id)sender;
@end

然后，您必须使用(非原子，分配)和方法正确地进行对象id的委托和合成:

then you have to make object id delegate and synthesis with (nonatomic, assign) propertly and method as below:

- (void)valueChange:(id)sender{
  if ([delegate respondToSelector:@selector(valueChangeNotify:)])
    [delegate valueChangeNotify:sender];
}

通过这种方式，您可以在视图控制器中获取通知状态更改.

By this way, you can get notify state change in view controller.

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