如何为UIButton编写动作，将其作为自定义单元格加载到tableview中？

Question

您好我是iOS开发的新手，我正在使用Objective C.我在UITableview中遇到了问题。也就是说，我需要为多个UIButton编写动作，并将其加载到tableview中（DutiesTableView.m＆amp; .h） ）作为自定义单元格（BreakTimeCell.m＆amp; .h）。该tableview（DutiesTableView.m＆amp; .h）作为使用XIB的自定义单元加载到另一个tableview（ViewController.m＆amp; .h，TableName是PersonalTable）中。 [Shift（自定义单元格），职责（UITableview），休息时间（UITableview）]，[这是我的ViewController.m

这是我的示例输出。当我点击Break time UIButton时，它应该在Main Tableview上显示UIDatePicker

Answer 1

创建一个按钮，

    UIButton *btnSample = [[UIButton alloc]initWithFrame:CGRectMake(215,10,100,50)];
    [btnSample setTitle:@"Button Title" forState:UIControlStateNormal];
    [yourView addSubview:btnSample];

向按钮添加操作

    [btnSample addTarget:self action:@selector(your action or method) forControlEvents:UIControlEventTouchUpInside];

Answer 2

在cellForRow

中添加

   yourButton.tag = indexPath.row;
  [yourButton addTarget:self action:@selector(methodName:) forControlEvents:UIControlEventTouchUpInside];

按以下方法执行任务

- (void)methodName:(id)sender
{
    // you can get index of button from sender.tag
}

Answer 3

您可以使用委托从自定义单元格到视图控制器进行回调，例如在代码中的自定义单元格中，BreakTimeCell.h文件声明协议并在BreakTimeCell.xib中添加按钮并提供出口以及对自定义单元格的操作，如下所示，

#import <UIKit/UIKit.h>

@class BreakTimeCell; //forword declaration 
@protocol BreakTimeCellDeleagte<NSObject>
- (void)breakTimeCell:(BreakTimeCell *)cell didTapTheButton:(UIButton *)aButton;
@end

@interface BreakTimeCell : UITableViewCell
@property (weak, nonatomic) IBOutlet UIButton *aButton;
@property (weak, nonatomic) id<BreakTimeCellDeleagte> cellDelegate;//this is important
- (IBAction)myButtonAction:(id)sender;
+ (BreakTimeCell *)getBreakTimeCell; //to get the custom cell
@end

并在BreakTimeCell.h文件中定义按钮的操作

#import "BreakTimeCell.h"

@implementation BreakTimeCell

+ (BreakTimeCell *)getBreakTimeCell {
   NSArray *nibContents = [[NSBundle mainBundle] loadNibNamed:@"BreakTimeCell" owner:self options:NULL];
   NSEnumerator *nibEnumerator = [nibContents objectEnumerator];
   BreakTimeCell *customCell = nil;
   NSObject* nibItem = nil;
   while ((nibItem = [nibEnumerator nextObject]) != nil) {
      if ([nibItem isKindOfClass:[BreakTimeCell class]]) {
         customCell = (BreakTimeCell *)nibItem;
         break;
     }
  }
  return customCell;
}

- (void)awakeFromNib {
   [super awakeFromNib];
   // Initialization code
}

- (void)setSelected:(BOOL)selected animated:(BOOL)animated {
   [super setSelected:selected animated:animated];

   // Configure the view for the selected state
}

//call the delegate method in the button action 
- (IBAction)myButtonAction:(id)sender {
   if([self.cellDelegate respondsToSelector:@selector(breakTimeCell:didTapTheButton:)])
    {
       [self.cellDelegate breakTimeCell:self didTapTheButton:sender];
    }
}
@end

并在视图控制器中将单元委托设置为视图控制器，

#import "ViewController.h" 
#import "BreakTimeCell.h"

@interface ViewController ()<UITableViewDelegate, UITableViewDataSource, BreakTimeCellDeleagte>

@end

@implementation ViewController

- (void)viewDidLoad {
   [super viewDidLoad];
  // Do any additional setup after loading the view, typically from a nib.
 }


 - (void)didReceiveMemoryWarning {
   [super didReceiveMemoryWarning];
   // Dispose of any resources that can be recreated.
 }

 - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
     return  1;
 }

 - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
   return 10;
 }

 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
   BreakTimeCell *cell = [tableView dequeueReusableCellWithIdentifier:@"MY_BREAK_CELL"];
   if (cell == nil) {
       cell = [BreakTimeCell getBreakTimeCell]; //get the cell
   }
   cell.cellDelegate = self; //set the delegate to controller (self)
   return cell;
}

//this is the delegate method called for the button action.
- (void)breakTimeCell:(BreakTimeCell *)cell didTapTheButton:(UIButton *)aButton {
   NSIndexPath *indexPath =  [self.personalTable indexPathForCell:cell];
   NSLog(@"button tapped for index:%ld",(long)indexPath.row);
}

就是这样，你会得到如下所示的输出，

2017-12-13 11:44:24.693161+0530 Test[3082:100133] button tapped for index:3
2017-12-13 11:44:25.177169+0530 Test[3082:100133] button tapped for index:4
2017-12-13 11:44:26.223166+0530 Test[3082:100133] button tapped for index:0
2017-12-13 11:44:27.663060+0530 Test[3082:100133] button tapped for index:1
2017-12-13 11:44:28.495780+0530 Test[3082:100133] button tapped for index:2