[英]Data are not passed between ViewControllers
I need to pass a data between two view controllers.here is my code. 我需要在两个视图控制器之间传递数据。这是我的代码。
for first view controller 对于第一视图控制器
-(void)editBotton {
Carttable *second=[[Carttable alloc]init];
UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:second];
nav.modalTransitionStyle=UIModalTransitionStyleCrossDissolve;
[self.navigationController pushViewController:second animated:YES];
NSString *temp=titlela.text;//titlela is UILabel
NSLog(@"%@",temp);
self.cart=second;
cart.cnftitle=temp;
}
in my cartable view controller.h 在我的可查看视图controller.h中
@property(nonatomic,retain)NSString *cnftitle;
and i synthesized too 我也合成了
- (void)viewDidLoad
{
[super viewDidLoad];
NSLog(@"%@",cnftitle);
}
one NSlog prints my text in label where another prints as NULL.... 一个NSlog在标签中打印我的文本,其中另一个以NULL打印。
am i missing anything? 我想念什么吗?
You're assigning the value after the view has loaded. 视图加载后,您将分配值。
Move your assignment before the pushViewController:
(as that's the point where the view is loaded) 将您的分配移动到pushViewController:
之前pushViewController:
因为这是加载视图的点)
Check this code, 检查此代码,
-(void)editBotton {
Carttable *second=[[Carttable alloc]init];
[second.view setAlpha:1.0f];
second.cnftitle = titlea.text;
UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:second];
nav.modalTransitionStyle=UIModalTransitionStyleCrossDissolve;
[self.navigationController pushViewController:second animated:YES];
}
Hope this will work for you. 希望这对您有用。
Enjoy Coding :) 享受编码:)
****in xode 4.5.1** storyboard**
we assume wee want to passed data between
viewcontroller1 to viewcontroller2
in the viewcontroller1 in .h class we import viewcontroller2.h
then we declare variable in viewcontroller2 ex: Nsstring *data;
then we can passed data like this..
in the viewcontroller1 we can code like this(in button event)
ViewController3 *vc3=[self.storyboard instantiateViewControllerWithIdentifier:@"ViewController2"];
vc3.data=textfield1.text;
vc3.image=imageview.image;
[self presentViewController:vc3 animated:YES completion:nil];
note=set the storyboard id of viewcontroller2 as ViewController2
it is on the right hand side utility menu 3rd tab
(select viewcontroller2 and set storyboard id)
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