cocos2d 使用UITextField

其實主要是兩行代碼：

1. UITextField *inputTextField = [[UITextField alloc] initWithFrame:CGRectMake(50,50,140,30)];
2. [CCDirector sharedDirector] openGLView] addSubview:inputTextField];

但是一定要注意以下兩點事項：

1、文本框默認樣式是直線型，邊框顏色是黑色；

2、文本框默認背景是透明的；

3、UITextField的坐標系與cocos2d是不一樣的；

所以有很多童鞋說加不上去，其實是已經加上去了，只是你看不到而已，要麼是你黑背景，要麼是坐標的問題。另外關於旋轉問題我沒有深入研究，但是主要注意一下兩點就問題不大了：

代碼1:[[[[CCDirector sharedDirector] openGLView] window] addSubview:inputTextField];
效果：添加的inputTextField會隨著window是橫屏還是豎屏變化，添加之後如果view下面覆蓋了一個cocos2d的按鈕，點擊按鈕的區域按鈕不響應點擊。
代碼2:[[[CCDirector sharedDirector] openGLView] addSubview:inputTextField];
效果：不隨著變化，並且底部的按鈕相應點擊

其實在cocos2d中通過文本框加上之後，通過UITextFieldDelegate我們是完全可以實現文本框的各種功能，在此我參考網上的一些例子最後寫了一個例子和大家分享一下：

1. // When you import this file, you import all the cocos2d classes
2. #import "cocos2d.h"
4. // HelloWorldLayer
5. @interface HelloWorldLayer : CCLayerColor<UITextFieldDelegate> {
6. UITextField *inputField;
7. }
9. @property (nonatomic, retain) IBOutlet UITextField *inputField;
11. // returns a CCScene that contains the HelloWorldLayer as the only child
12. +(CCScene *) scene;
14. @end

1. // Import the interfaces
2. #import "HelloWorldLayer.h"
4. // HelloWorldLayer implementation
5. @implementation HelloWorldLayer
6. @synthesize inputField;
8. +(CCScene *) scene
9. {
10. // 'scene' is an autorelease object.
11. CCScene *scene = [CCScene node];
13. // 'layer' is an autorelease object.
14. HelloWorldLayer *layer = [HelloWorldLayer node];
16. // add layer as a child to scene
17. [scene addChild: layer];
19. // return the scene
20. return scene;
21. }
23. // on "init" you need to initialize your instance
24. -(id) init
25. {
26. // always call "super" init
27. // Apple recommends to re-assign "self" with the "super" return value
28. if( (self=[super initWithColor:ccc4(0, 255, 255,255)])){
30. inputField = [[UITextField alloc] initWithFrame:CGRectMake(100,100,150,30)];//設置文本框大小和位置
31. [inputField setBackgroundColor:[UIColor yellowColor]];//背景色
32. [inputField setTextAlignment:UITextAlignmentCenter];//水平居中
33. inputField.contentVerticalAlignment=UIControlContentVerticalAlignmentCenter;//垂直居中
34. [inputField setFont:[UIFont fontWithName:@"Bauhaus Md BT" size:22]];
35. [inputField setText:@"CoreyGuo"];
36. [inputField becomeFirstResponder];//彈出鍵盤
37. //inputField.autocorrectionType = UITextAutocorrectionTypeNo;
38. //inputField.autocapitalizationType = UITextAutocapitalizationTypeNone;
39. //inputField.returnKeyType = UIReturnKeyDone;
40. [inputField setTextColor:[UIColor colorWithRed:96/255.0f green:55/255.0f blue:17/255.0f alpha:1]];
41. inputField.clearButtonMode = UITextFieldViewModeWhileEditing; //編輯時會出現個修改X
42. //inputField.secureTextEntry = YES; //如果是密碼框時 ,加上這句
43. inputField.delegate=self;
44. [[[CCDirector sharedDirector] openGLView] addSubview:inputField];
46. self.isTouchEnabled=YES;
47. }
48. return self;
49. }
51. - (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
52. {
53. if ([textField.text length] == 8) { //字符限制
54. if ([string length] < 1) { //用於相應退格事件
55. textField.text = [textField.text substringToIndex:[textField.text length] - 1]; //如果用戶點擊退格，那麼將文本內容去一位
56. }
57. return FALSE; //返回FALSE，文本框就不會相應鍵盤上的輸入，包括退格
58. }
59. return TRUE;
60. }
61. - (void)textFieldDidEndEditing:(UITextField *)textField
62. {
63. NSLog(@"textFieldDidEndEditing");//完成後要處理的事件
64. }
66. -(void) ccTouchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
68. [inputField resignFirstResponder];//表示關閉鍵盤
69. }
71. // on "dealloc" you need to release all your retained objects
72. - (void) dealloc
73. {
74. // in case you have something to dealloc, do it in this method
75. // in this particular example nothing needs to be released.
76. // cocos2d will automatically release all the children (Label)
77. [inputField removeFromSuperview];
78. [inputField release];
80. // don't forget to call "super dealloc"
81. [super dealloc];
82. }
83. @end