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ios - 如何在导航栏右侧显示注销按钮以从应用程序注销？
标签 ios
如何以导航栏右侧按钮的形式添加从应用程序中注销用户的功能。因为导航栏左侧有一个导航按钮，可以导航回上一个 View 。可以吗导航栏上有两个按钮吗？
登录 View Controller 的代码如下所示:
- (IBAction)btnLogin:(id)sender
{
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *docsPath = [paths objectAtIndex:0];
NSString *path = [docsPath stringByAppendingPathComponent:@"contacts.db"];
FMDatabase *database = [FMDatabase databaseWithPath:path];
if ([txtUser.text length] == 0 || [txtPass.text length]== 0){
UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"Error" message:@"Kindly enter details in all fields" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles: nil];
[alert show];
}
[database open];
BOOL success = NO;
NSInteger count = [database intForQuery:@"select count(*) from RegMembers where USERNAME = ? and PASSWORD = ?", txtUser.text, txtPass.text];
if (count > 0)
{
success = YES;
appDelegate.username = txtUser.text;
UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"Welcome" message:@"Login successful" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles: nil];
[alert show];
carTypeViewController *car = [[carTypeViewController alloc]initWithNibName:@"carTypeViewController" bundle:nil];
[self.navigationController pushViewController:car animated:YES];
}
else
{
UIAlertView *alert1 = [[UIAlertView alloc]initWithTitle:@"Kindly enter the correct credentials" message:@"Entered username or password is incorrect" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles: nil];
[alert1 show];
txtUser.text=@"";
txtPass.text=@"";
}
[database close];
}
最佳答案
1) 要以编程方式在 NavBar 上添加按钮，您可以使用如下代码
UIBarButtonItem* rightNavButton=[[UIBarButtonItem alloc] initWithTitle:@"logout"style:UIBarButtonItemStyleBordered target:self action:@selector(logout:)];
self.navigationItem.rightBarButtonItem =rightNavButton ;
或
2) 如果您使用的是界面构建器，您可以将条形按钮项拖到导航栏的右侧。
关于ios - 如何在导航栏右侧显示注销按钮以从应用程序注销？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/21095969/