ios UITestfiled

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- (void)LY_Display {     UILabel *Label = [[UILabel alloc] initWithFrame:CGRectMake(60, 180, 60, 30)];     [self.view addSubview:Label];     Label.backgroundColor = [UIColor clearColor];     Label.text = @"密   码";     Label.font= [UIFont fontWithName:@"zapfino" size:(15.0f)]; //字体设置         UITextField *Text = [[UITextField alloc] initWithFrame:CGRectMake(143, 180, 80, 30) ];     [self.view addSubview:LY_Text];     Text.backgroundColor = [UIColor whiteColor];     [Text setBorderStyle:UITextBorderStyleLine];             //边框设置     Text.placeholder = @"password";                          //默认显示的字     Text.font = [UIFont fontWithName:@"helvetica" size:12];  //字体和大小设置     Text.textColor = [UIColor redColor];                     //设置字体的颜色     Text.clearButtonMode = UITextFieldViewModeWhileEditing;  //清空功能x     Text.returnKeyType = UIReturnKeyDone;                    //键盘有done     Text.secureTextEntry = YES;                              //密码输入时     Text.delegate = self;                                    //托管      }

委托事件

@protocol UITextFieldDelegate <NSObject>

@optional

- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField; // 返回NO则不许编辑

- (void)textFieldDidBeginEditing:(UITextField *)textField; // became first responder

- (BOOL)textFieldShouldEndEditing:(UITextField *)textField; // 返回YES允许结束并且resign first responder status. 返回NO不许编辑状态结束

- (void)textFieldDidEndEditing:(UITextField *)textField; // 上面返回YES后执行;上面返回NO时有可能强制执行(e.g. view removed from window)

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string; // 返回NO不改变

- (BOOL)textFieldShouldClear:(UITextField *)textField; // clear button事件,返回NO过滤之

- (BOOL)textFieldShouldReturn:(UITextField *)textField; // 'return' key事件.返回NO过滤之

@end