ios代码备忘

1.自定义导航栏返回按钮

self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"back" style:UIBarButtonItemStyleBordered target:self action:@selector(back)];

2.代码调用segue实现跳转

 

[self performSegueWithIdentifier:@"ShowRoleListSegue" sender:self];

同时可实现函数以在跳转前设置相关数据

 

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender

{

    if ([[segue identifier] isEqualToString:@"ShowRoleListSegue"]) {

       RoleListTableViewController *roleListTableViewController = [segue destinationViewController];

        roleListTableViewController.loginData=loginData;    

    }

}

2.返回导航栏中上一个视图

 

[self.navigationController popViewControllerAnimated:YES];

 

3.使用故事版id实现跳转

 

UIViewController *vc = [self.storyboard instantiateViewControllerWithIdentifier:@"CustomerBaseInfoReadonly"];

 [self.navigationController pushViewController:vc animated:YES];

4.try catch

 

 @try

    {

         [self performSegueWithIdentifier:@"buyInfoDetailSegue" sender:self];

    }

    @catch (NSException *exception)

    {

        NSLog(@"Caught %@%@", [exception name], [exception reason]);

    }

5.exit

- (void)exitApplication {    
		[UIView beginAnimations:@"exitApplication" context:nil];    
	    [UIView setAnimationDuration:0.5];    
		 [UIView setAnimationDelegate:self];    
	[UIView setAnimationTransition:UIViewAnimationCurveEaseOut forView:self.window cache:NO];    
    [UIView setAnimationDidStopSelector:@selector(animationFinished:finished:context:)];    
		    self.window.bounds = CGRectMake(0, 0, 0, 0);    
    [UIView commitAnimations];    
	}  
- (void)animationFinished:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context {    
    if ([animationID compare:@"exitApplication"] == 0) {    
        exit(0);    
	    }  
}