這次講的內容很簡單：
1.首先我們還是創建一個Single View Application，然后打開MainStoryboard_iphone.storyboard,在里面放入倆lable和兩個TextFiled:
2.接著開始寫代碼：ViewController.h:
~~~
#import <UIKit/UIKit.h>
@interface ViewController : UIViewController{
UITextField *nameField;
UITextField *numberField;
}
@property (nonatomic,retain) IBOutlet UITextField *nameField;
@property (nonatomic,retain) IBOutlet UITextField *numberField;
- (IBAction)backgroundTap:(id)sender;
- (IBAction)textFiledReturnEditing:(id)sender;
@end
~~~
ViewController.m:
~~~
#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController
@synthesize nameField;
@synthesize numberField;
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
}
//點擊屏幕空白view時觸發的事件
- (IBAction)backgroundTap:(id)sender{
[nameField resignFirstResponder];//通知文本失去第一響應者狀態
[numberField resignFirstResponder];
}
//點擊return時觸發的事件?
- (IBAction)textFiledReturnEditing:(id)sender {
[sender resignFirstResponder];
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
} else {
return YES;
}
}
@end
~~~
3.接著我們連接操作和輸出口：
將背景view的類別設置為UIControl，這樣我們就能對屏幕的事件進行處理了，將Control的touch down輸出連接到backgroundTap事件上，因為點擊軟鍵盤會觸發did end on exit，那我們就把兩個textFiled的did end on exit輸出連接到textFiledReturnEditing事件上。當然我們不要忘記將兩個textFiled控件的輸出與ViewController的相應控件接口連接在一起。
4.運行程序看看效果：
點擊textFiled時：
點擊return或點擊界面空白時：
