自定义数字交易密码键盘
1.基本使用： HPCustomKeyboardTextField *field = [[HPCustomKeyboardTextField alloc]initWithFrame:CGRectMake(50, 80, 180, 50) randomKeyboard:YES]; field.borderStyle = UITextBorderStyleRoundedRect; // 键入改变值时回调 field.changeTextFieldBlock = ^(NSString *text){ }; [self.view addSubview:field];
2.一些属性：
- (instancetype)initWithFrame:(CGRect)frame randomKeyboard:(BOOL)random; random标识键盘是否随机排列。 @property (assign,nonatomic) NSInteger limitNumber;最多输入几位数字，默认6位。