1

当我单击一个单元格时,我遇到了崩溃(应用程序在 iOS 模拟器中退出)。错误代码是

“EXC_BAD_ACCESS(代码 = 1,地址 = 0x310cc493)

这是代码:

// .h

#import <UIKit/UIKit.h>

@interface ChecklistsViewController : UITableViewController

@end

// .m

#import "ChecklistsViewController.h"

@interface ChecklistsViewController ()

@end

@implementation ChecklistsViewController

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

- (void)viewDidUnload
{
    [super viewDidUnload];
    // Release any retained subviews of the main view.
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return 100;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"ChecklistItem"];

    UILabel *label = (UILabel *)[cell viewWithTag:1000];

    if (indexPath.row % 5 == 0) {
        label.text = @"Walk the dog";
    } else if (indexPath.row % 5 == 1) {
        label.text = @"Brush my teeth";
    } else if (indexPath.row % 5 == 2) {
        label.text = @"Learn iOS development";
    } else if (indexPath.row % 5 == 3) {
        label.text = @"Soccer practice";
    } else if (indexPath.row % 5 == 4)
        label.text = @"Eat ice cream";       

    return cell;
}

- tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath    
{
    [tableView deselectRowAtIndexPath:indexPath animated:YES];
}  // Control reaches end of non-function

@end
4

3 回答 3

3

UITableViewCell在您的示例中,如果没有出队,则不分配 a 。你需要做这样的事情:

UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"ChecklistItem"];
if( cell == nil ) {
    cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:@"ChecklistItem"] autorelease];

    // whatever additional initialization
    ...
}
于 2012-09-03T19:42:08.337 回答
1
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{


   static NSString *CellIdentifier = @"Cell";
   UItableViewCell *cell = (UITableViewCell *) [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

   if (cell == nil) {
       cell = [[UItableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
   } 
//write your code here

return cell;

}
于 2012-09-04T10:14:27.083 回答
0

您需要分配UITableViewCellintableView: cellForRowAtIndexPath:方法。

你的方法应该是这样的:

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


   static NSString *CellIdentifier = @"Cell";
   UItableViewCell *cell = (UITableViewCell *) [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

   if (cell == nil) {
       cell = [[UItableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
   } 

//INSERT YOUR CODE

}
于 2012-09-03T19:45:36.293 回答