OutletActionViewController.h

#import 
     
      @interface OutletActionViewController : UIViewController{    IBOutlet UITextField *txtName;}// expose the outlet as a property@property (nonatomic, retain) UITextField *txtName;// declare the action- (IBAction) btnClicked: (id) sender;@end
     

 

OutletActionViewController.m

#import "OutletActionViewController.h"@implementation OutletActionViewController// synthesize the property@synthesize txtName;// display text of the textbox in the alert- (IBAction) btnClicked: (id) sender {    NSString *str =         [[NSString alloc] initWithFormat: @"Hello, %@", txtName.text];        UIAlertView *alert =    [[UIAlertView alloc]     initWithTitle: @"Hello"    message: str    delegate: self    cancelButtonTitle: @"OK"    OtherButtonTitles: nil];        [alert show];    [str release];    [alert release];}- (void) dealloc {    // release the outlet    [txtName release];    [super dealloc];}

 

如何添加关联

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Outlet添加:

按Control同时将File's Owner拖放到IBOutlet在视图中所在的对象(eg: Text Field)

File's Owner --> Outlet

Action添加:

按Control同时将事件需要触发的控件(eg: Round Rect Button)拖放到File's Owner

选择动作的指定函数

Action --> File's Owner