SLPasswordInputView

代理：

-(void)passwordInputView:(SLPasswordInputView *)inputView willBeginInputWithPassword:(NSString *)password;
-(void)passwordInputView:(SLPasswordInputView *)inputView willEndInputWithPassword:(NSString *)password;
-(void)passwordInputView:(SLPasswordInputView *)inputView didChangeInputWithPassword:(NSString *)password;
-(void)passwordInputView:(SLPasswordInputView *)inputView didFinishInputWithPassword:(NSString *)password;

属性

密码长度
@property (assign, nonatomic) NSUInteger passwordLength;
密码字符大小
@property (assign, nonatomic) CGFloat passwordWidth;
密码字符颜色（只在使用默认密码字符图片时有效
@property (strong, nonatomic) UIColor *passwordColor;
密码字符图片（正方形图片，默认为黑色圆点）
@property (strong, nonatomic) UIImage *passwordImage;
显示边框
@property (assign, nonatomic) BOOL showBorder;
边框圆角大小
@property (assign, nonatomic) CGFloat borderCornerRadius;
边框线宽
@property (assign, nonatomic) CGFloat borderWidth;
边框颜色
@property (strong, nonatomic) UIColor *borderColor;
键盘类型
@property (assign, nonatomic) UIKeyboardType keyboardType;
返回按钮类型
@property (assign, nonatomic) UIReturnKeyType returnKeyType;
密码文本
@property (copy, nonatomic, nullable) NSString *passwordText;
内边距
@property (assign, nonatomic) UIEdgeInsets contentInsets;