iOS模拟器键盘的下面添加一个完成按钮

前言

为了满足一些用户的特殊需求,可能有的用户希望在键盘的左下角添加一个完成按钮,就像微信的右下角可以切换成"发送"和"换行"两个功能,所以我上网找了一些资料,整理了一下,大概的核心代码就是下面这些

1. - (void)addDoneButtonToNumPadKeyboard  
2. {  
3.     UIButton *doneButton = [UIButton buttonWithType:UIButtonTypeCustom];  
4.     if (systemVersion < 8.0){  
5.         doneButton.frame = CGRectMake(0, 163, 106, 53);  
6.     }else{  
7.         doneButton.frame = CGRectMake(0, SCREEN_SIZE.height-53, 106, 53);  
8.     }  
9.     doneButton.tag = NUM_PAD_DONE_BUTTON_TAG;  
10.     doneButton.adjustsImageWhenHighlighted = NO;  
11.     [doneButton setTitle:@"完成" forState:UIControlStateNormal];  
12.     [doneButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];  
13.     [doneButton addTarget:self action:@selector(doneButton:) forControlEvents:UIControlEventTouchUpInside];  
14.       
15.     NSArray *windowArr = [[UIApplication sharedApplication] windows];  
16.     if (windowArr != nil && windowArr.count > 1){  
17.         UIWindow *needWindow = [windowArr objectAtIndex:1];  
18.         UIView *keyboard;  
19.         for(int i = 0; i < [needWindow.subviews count]; i++) {  
20.             keyboard = [needWindow.subviews objectAtIndex:i];  
21.             NSLog(@"%@", [keyboard description]);  
22.             if(([[keyboard description] hasPrefix:@"<UIPeripheralHostView"] == YES) || ([[keyboard description] hasPrefix:@"<UIKeyboard"] == YES) || ([[keyboard description] hasPrefix:@"<UIInputSetContainerView"] == YES)){  
23.                   
24.                 UIView *doneButtonView = [keyboard viewWithTag:NUM_PAD_DONE_BUTTON_TAG];  
25.                 if (doneButtonView == nil){  
26.                     [keyboard addSubview:doneButton];  
27.                 }  
28.             }  
29.         }  
30.     }  
31. }  
32.   
33. -(void)removeDoneButtonFromNumPadKeyboard  
34. {  
35.     UIView *doneButton = nil;  
36.   
37.     NSArray *windowArr = [[UIApplication sharedApplication] windows];  
38.     if (windowArr != nil && windowArr.count > 1){  
39.         UIWindow *needWindow = [windowArr objectAtIndex:1];  
40.         UIView *keyboard;  
41.         for(int i = 0; i < [needWindow.subviews count]; i++) {  
42.             keyboard = [needWindow.subviews objectAtIndex:i];  
43.             if(([[keyboard description] hasPrefix:@"<UIPeripheralHostView"] == YES) || ([[keyboard description] hasPrefix:@"<UIKeyboard"] == YES) || ([[keyboard description] hasPrefix:@"<UIInputSetContainerView"] == YES)){  
44.                 doneButton = [keyboard viewWithTag:NUM_PAD_DONE_BUTTON_TAG];  
45.                 if (doneButton != nil){  
46.                     [doneButton removeFromSuperview];  
47.                 }  
48.             }  
49.         }  
50.     }  
51. }