[英]why am I getting error “[UIViewController tableView:numberOfRowsInSection:]: unrecognized selector sent to instance 0x4e38c50'”?
[英]Why am I getting a “unrecognized selector” error when I click on a button?
当我单击任何一个toobar按钮时,我得到一个:
由于未捕获的异常'NSInvalidArgumentException'而终止应用程序,原因:'-[-[AddRecipientsTableViewController btnRemoteRecipients:]:无法识别的选择器已发送到实例0x4b87b10'
头文件
@interface AddRecipientsTableViewController : UITableViewController {
}
-(IBAction) btnLocalRecipients;
-(IBAction) btnRemoteRecipients;
@end
接口文件
#import "AddRecipientsTableViewController.h"
@implementation AddRecipientsTableViewController
-(IBAction) btnLocalRecipients{
}
-(IBAction) btnRemoteRecipients{
}
#pragma mark -
#pragma mark View lifecycle
- (void)viewDidLoad {
[super viewDidLoad];
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem;
}
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
self.navigationItem.title = @"Add Recipients";
self.navigationController.toolbarHidden=NO;
UIBarButtonItem *localItem;
UIBarButtonItem *remoteItem;
localItem = [[ UIBarButtonItem alloc ] initWithTitle: @"Local"
style: UIBarButtonItemStyleBordered
target: self
action: @selector( btnLocalRecipients: ) ];
remoteItem = [[ UIBarButtonItem alloc ] initWithTitle: @"Remote"
style: UIBarButtonItemStyleBordered
target: self
action: @selector( btnRemoteRecipients: ) ];
self.toolbarItems = nil ;
self.toolbarItems = [ NSArray arrayWithObjects: localItem,remoteItem,nil ];
[localItem release];
[remoteItem release];
}
/*
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
}
*/
- (void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
self.navigationController.toolbarHidden=YES;
}
/*
- (void)viewDidDisappear:(BOOL)animated {
[super viewDidDisappear:animated];
}
*/
/*
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Return YES for supported orientations.
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
*/
#pragma mark -
#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.
return 1;
}
// Customize the appearance of table view cells.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
}
// Configure the cell...
return cell;
}
/*
// Override to support conditional editing of the table view.
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
// Return NO if you do not want the specified item to be editable.
return YES;
}
*/
/*
// Override to support editing the table view.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
// Delete the row from the data source.
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
}
else if (editingStyle == UITableViewCellEditingStyleInsert) {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view.
}
}
*/
/*
// Override to support rearranging the table view.
- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath {
}
*/
/*
// Override to support conditional rearranging of the table view.
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath {
// Return NO if you do not want the item to be re-orderable.
return YES;
}
*/
#pragma mark -
#pragma mark Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
// Navigation logic may go here. Create and push another view controller.
/*
<#DetailViewController#> *detailViewController = [[<#DetailViewController#> alloc] initWithNibName:@"<#Nib name#>" bundle:nil];
// ...
// Pass the selected object to the new view controller.
[self.navigationController pushViewController:detailViewController animated:YES];
[detailViewController release];
*/
}
#pragma mark -
#pragma mark Memory management
- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Relinquish ownership any cached data, images, etc. that aren't in use.
}
- (void)viewDidUnload {
// Relinquish ownership of anything that can be recreated in viewDidLoad or on demand.
// For example: self.myOutlet = nil;
}
- (void)dealloc {
[super dealloc];
}
@end
您需要在btnLocalRecipients
和btnRemoteRecipients
函数中添加:(id) sender
。 试试看
-(IBAction) btnLocalRecipients:(id) sender{
}
-(IBAction) btnRemoteRecipients:(id) sender{
}
尝试从选择器中删除:
。 您声明的方法没有参数,因此名称中没有:
。
选择应该是btnRemoteRecipients
不btnRemoteRecipients:
删除:
)
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.