从选定的不同类设置 UIButton

Question

我知道这不是一个非常高级的问题，但我感到迷茫。我有一个定义自定义表格单元格样式的类，其中包含我希望编辑的所需按钮。然后在另一个类中，我使用这种单元格类型并构造一个表格视图。然后我在不同类的按钮上写一个IBAction。当按钮被点击时，它应该保持选中状态。我已经尝试了几件事，但我无法正确获得按钮的引用以提供所需的结果。

我还在努力适应 Objective-C。

customcellstyle.m

   #import "imageCellCell.h"

    @implementation imageCellCell

    @synthesize view;
    @synthesize starbtn;


    - (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
    {
        self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
        if (self) {

            view = [[UIView alloc] initWithFrame:self.frame];
            [self addSubview:view];


    // initiate favorites button       
            starbtn = [[UIButton alloc]initWithFrame:CGRectMake(243,0, 30, 30)];

            [starbtn setTintColor:[UIColor clearColor]]; 

            [starbtn setBackgroundImage:[UIImage imageNamed:@"startbefore.jpg"]
                               forState:UIControlStateNormal];
            [starbtn setBackgroundImage:[UIImage imageNamed:@"startafter.jpg"]
                               forState:UIControlStateSelected];
            [starbtn setBackgroundImage:[UIImage imageNamed:@"startafter.jpg"]
                               forState:UIControlStateHighlighted];
            [starbtn setBackgroundImage:[UIImage imageNamed:@"startafter.jpg"]


    [view addSubview:starbtn];
                               forState:UIControlStateHighlighted|UIControlStateSelected|UIControlStateDisabled];

tableclass.m

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

NSString *CellIdentifier;
NSString *CellIdentifierimg;

    UITableViewCell *cell;
    if (cell == nil) {
        if (indexPath.row == 0) {
            cell = [[imageCellCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifierimg];
        } else if (indexPath.row == 1) {
            cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault  reuseIdentifier:CellIdentifier];

    }
    }




    switch ([indexPath row])
    {
        case 0:
        {

            imageCellCell *firstRowCell = (imageCellCell *)cell;  

            // reference of the favorites button to the buttonclick method

            [firstRowCell.starbtn addTarget:self action:@selector(clickFavButton:) forControlEvents:UIControlEventTouchUpInside];
            firstRowCell.accessoryType = UITableViewCellAccessoryNone;

            cell.selectionStyle = UITableViewCellSelectionStyleNone;


            break;

        }




-(IBAction)clickFavButton:(id)sender{


    customcellstyle *class = [[customcellstyle alloc] init];;


[class.starbtn setSelected:YES];
[class.starbtn setHighlighted:YES];

    [starbtn setSelected:YES];
    [starbtn setHighlighted:YES];

}

Answer 1

您应该创建一个自定义按钮类，您需要使用它的选定值设置和处理按钮图像，我对复选框按钮做了同样的事情，例如

在.h文件中

@interface MXCheckButton : UIButton {
    BOOL    _checked;
}

@property (nonatomic, setter = setChecked:) BOOL checked;

-(void) setChecked:(BOOL) check;

@end

在你的 .m 文件中

@implementation MXCheckButton
@synthesize checked = _checked;

-(id) init
{
    if( self=[super init] )
    {
        self.checked = NO;
        [self addTarget:self action:@selector(OnCheck:) forControlEvents:UIControlEventTouchUpInside];
    }
    return self;
}

-(void) awakeFromNib
{
    self.checked = NO;
    [self addTarget:self action:@selector(OnCheck:) forControlEvents:UIControlEventTouchUpInside];
}

-(void) setChecked:(BOOL) check
{
    _checked = check;
    if( _checked )
    {
        UIImage* img = [UIImage imageNamed:@"checked.png"];
        [self setImage:img forState:UIControlStateNormal];
    }
    else
    {
        UIImage* img = [UIImage imageNamed:@"unchecked.png"];
        [self setImage:img forState:UIControlStateNormal];
    }
}

-(void) OnCheck:(id) sender
{
    self.checked = !_checked;
}

@end

在这里您只需更改图像文件名即可开始使用！