iOS：在视图之间传递数据（数组值或字符串）？

Question

如何使用下面的代码将NSString值传递给“webwhatsnew”子视图。谢谢

-(IBAction)Whatsnew { 
    NSString *myString =[URL absoluteString]; 
    // how can I pass this value to "webwhatsnew" subview 
    webwhatsnew = [[WebWhatsnewView alloc]initWithNibName:@"WebWhatsnewView"bundle:nil]; 
    [self.view addSubview:webwhatsnew.view]; 
} 

Answer 1

在WebWhatsnewView中创建一个NSString属性。然后，只需为它设置一个值。例如：

//WebWhatsnewView.h 
... 
@property (nonatomic, retain) NSString *someString; 
... 

-(IBAction)Whatsnew { 
    NSString *myString =[URL absoluteString]; 
    webwhatsnew = [[WebWhatsnewView alloc]initWithNibName:@"WebWhatsnewView"bundle:nil]; 
    webwhatsnew.someString = myString; //if myString is a string that you want to pass 
    [self.view addSubview:webwhatsnew.view]; 
} 

希望它可以帮助

编辑

//WebWhatsnewView.m 
... 
@synthesize someString; 
... 

Answer 2

你需要有一个字符串属性/实体在WebWhatsnewView。所以你可以设置为

webwhatsnew.<your_string_entity> = myString; 

一定要合成它。

Answer 3

还有另一种方法，你可以用方法不做。只需在WebWhatsnewView类中声明并定义参数类型方法即可。

在.H

-(void)setSomeData:(NSString*)str; 

在.M

-(void)setSomeData:(NSString*)str 
{ 
    NSString *myString=str; 
} 

然后调用它

-(IBAction)Whatsnew { 
    NSString *myString =[URL absoluteString]; 
    webwhatsnew = [[WebWhatsnewView alloc]initWithNibName:@"WebWhatsnewView"bundle:nil]; 

    [self.view addSubview:webwhatsnew.view]; 
    [webwhatsnew setSomeData:myString]; 

    //or [webwhatsnew setSomeData:@"Here is the real Strings"]; 
}