ios 頁面跳轉之間傳遞數據—
主要用到了，兩個類，一個delegate
a類，調用b類，當b類執行之後，需要把一個數據傳遞給a類，a類把這個數據顯示出來。
1.delegate,就這一個頭文件就足夠了。在類中去實現這個代理方法
#import
@protocolUIViewPassValueDelegate
- (void)passValue:(NSString*)value;
一旦某個類，實現了這個回調函數，這個類就會獲取當前的value數據。因此，接收數據的類一定實現一個回調函數。對於當前項目就是passValue
@end
2.第一個頁面
.h文件
#import
#import UIViewPassValueDelegate.h
#import ValueInputView.h
@interfaceDelegateSampleViewController : UIViewController
{
UITextField*_value;
}
@property(strong, nonatomic) IBOutletUITextField*value;
- (IBAction)buttonClick:(id)sender;
@end
.m文件
#import DelegateSampleViewController.h
@implementationDelegateSampleViewController
@synthesizevalue = _value;
- (id)initWithNibName:(NSString*)nibNameOrNil bundle:(NSBundle*)nibBundleOrNil
{
self= [superinitWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if(self) {
}
returnself;
}
- (void)viewDidLoad
{
[superviewDidLoad];
}
- (void)viewDidUnload
{
[selfsetValue:nil];
[superviewDidUnload];
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return(interfaceOrientation == UIInterfaceOrientationPortrait);
}
- (IBAction)buttonClick:(id)sender
{
ValueInputView* valueView = [[ValueInputViewalloc] init];
valueView.delegate= self;
[selfsetModalTransitionStyle:UIModalTransitionStyleCoverVertical];
[selfpresentModalViewController:valueView animated:YES];
}
-(void)passValue:(NSString*)value
{
self.value.text= value;
NSLog(@the get value is %@,value);
}
@end
3.第二個類:
.h文件
#import
#import UIViewPassValueDelegate.h
@interfaceValueInputView : UIViewController
{
NSObject
UITextField* _value;
}
@property(retain, nonatomic) IBOutletUITextField*value;
@property(nonatomic,retain) NSObject
- (IBAction)buttonClick:(id)sender;
@end
.m文件
#import ValueInputView.h
@implementationValueInputView
@synthesizevalue=_value;
@synthesizedelegate;
- (id)initWithNibName:(NSString*)nibNameOrNil bundle:(NSBundle*)nibBundleOrNil
{
self= [superinitWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if(self) {
// Custom initialization
}
returnself;
}
- (void)viewDidLoad
{
[superviewDidLoad];
}
- (void)viewDidUnload
{
[selfsetValue:nil];
[superviewDidUnload];
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return(interfaceOrientation == UIInterfaceOrientationPortrait);
}
- (IBAction)buttonClick:(id)sender {
[delegatepassValue:self.value.text];
NSLog(@self.value.text is %@,self.value.text);
[selfdismissModalViewControllerAnimated:YES];
}
@end
