如何将值传递给另一个视图控制器？

Question

我想通过这种方式将localstringtextnote传递给Uploadviewcontroller，

UIViewController *controllerNew = [[UploadViewController alloc] initWithNibName:@"UploadView" bundle:nil owner:self];
        controllerNew.localStringtextnote = localStringtextnote;
        [self.navigationController pushViewController:controllerNew animated:YES];
        [controllerNew release];

但我收到此错误“@property localstringtextnote不喜欢uiviewcontroller类型的对象” 要么 我想通过modalTransistionstyle

UploadViewController *aSecondViewController = [[UploadViewController alloc] initWithNibName:@"UploadView" bundle:nil];
        aSecondViewController.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
        [self presentModalViewController:aSecondViewController animated:YES];


        [UIView commitAnimations];

怎么做？提前谢谢。

Answer 1

声明变量

NSString *_localStringtextnote;

在UploadViewController.h档案中。

还在同一文件中为该变量添加属性。

@property(nonatomic,copy) NSString *localStringtextnote;

在.m文件中，在实现中合成它。

@synthesize localStringtextnote=_localStringtextnote;

现在运行应用程序。

Answer 2

        UploadViewController *controllerNew = [[UploadViewController alloc] initWithNibName:@"UploadView" bundle:nil owner:self];
        controllerNew.localStringtextnote = localStringtextnote;
        [self.navigationController pushViewController:controllerNew animated:YES];
        [controllerNew release];

将uiview控制器更改为UploadViewController，因为uiview控制器没有任何属性localStringtextnote

Answer 3

您必须在localStringtextnote中将UploadViewController声明为@property(nonatomic,retain)NSString * localStringtextnote;，并在.m文件中进行综合。

Answer 4

在controllerNew中创建一个新方法（不要忘记在* .h文件中声明它）：

-(id) setParams:(NSString*)str {
   localStringtextnote = [[NSString alloc] initWithString:str];
   return self;
}

然后，当你需要puth这个视图控制器时：

    UploadViewController *controllerNew = [[UploadViewController alloc] initWithNibName:@"UploadView" bundle:nil owner:self];
        [self.navigationController pushViewController:controllerNew animated:YES];
controllerNew = [controllerNew setParams:localStringtextnote];
    [controllerNew release];