以下是我在屏幕上看到的内容(我试图展示我在屏幕上看到的内容)
++++++++++++++++++++++++++++++++++
+ +
+ TextField-Name +
+ +
+ Save Button +
+ +
+ UITableView +
+ . +
+ . +
+ . +
+ +
++++++++++++++++++++++++++++++++++
当我单击保存按钮时,数据将被存储,并且我在下面的表格视图中显示相同的内容。问题是当点击保存时,数据被保存,但它没有显示在UITableView
. 我相信[self.myTableView reloadData];
会做的伎俩,但它没有做。
下面是我的代码。
.h 文件
#import <UIKit/UIKit.h>
@interface DeviceDetailViewController : UIViewController<UITableViewDelegate, UITableViewDataSource>
@property (weak, nonatomic) IBOutlet UITextField *nameTextField;
@property (strong, nonatomic) IBOutlet UITableView *myTableView;
- (IBAction)save:(id)sender;
@end
.m 文件
@interface DeviceDetailViewController ()
@end
@implementation DeviceDetailViewController
@synthesize myTableView;
- (IBAction)save:(id)sender {
// code for saving data
NSLog(@"saved data and now reload data.... started....");
[self.myTableView reloadData];
// I thought this statement will do magic... but its not....
NSLog(@"saved data and now reload data.... finised....");
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
// Return the number of sections.
return 1;
}
- (NSInteger) tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// Return the number of rows in the section.
NSLog(@"numberOfRowsInSection %d", self.devices.count);
return self.devices.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"Cel3";
UITableViewCell *cell = [myTableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
// Configure the cell...
NSManagedObject *device = [self.devices objectAtIndex:indexPath.row];
NSLog(@"cellForRowAtIndexPath %@ %@ by %@", [device valueForKey:@"name"], [device valueForKey:@"version"], [device valueForKey:@"company"]);
[cell.textLabel setText:[NSString stringWithFormat:@"%@ %@", [device valueForKey:@"name"], [device valueForKey:@"version"]]];
[cell.detailTextLabel setText:[device valueForKey:@"company"]];
return cell;
}
当我运行应用程序时,下面是我得到的NSLOG
2012-12-31 11:52:34.222 MyStore[720:11603] numberOfRowsInSection 0
2012-12-31 11:52:34.627 MyStore[720:11603] numberOfRowsInSection 2
2012-12-31 11:52:34.628 MyStore[720:11603] cellForRowAtIndexPath iPhone 4s by Apple
2012-12-31 11:52:34.629 MyStore[720:11603] cellForRowAtIndexPath X10 Mini Pro by Sony
当我添加一些东西时,我得到
2012-12-31 11:53:21.868 MyStore[720:11603] saved data and now reload data.... started....
2012-12-31 11:53:21.869 MyStore[720:11603] numberOfRowsInSection 2
2012-12-31 11:53:21.870 MyStore[720:11603] saved data and now reload data.... finised....
2012-12-31 11:53:21.871 MyStore[720:11603] cellForRowAtIndexPath iPhone 4s by Apple
2012-12-31 11:53:21.872 MyStore[720:11603] cellForRowAtIndexPath X10 Mini Pro by Sony
这意味着所有方法都被调用,但我仍然没有获取数据。
有人可以指出我需要编写哪些额外的代码吗?