<Modal
                    title="登录"
                    visible={this.state.modal}
                    onOk={this.checkLogin}
                    onCancel={this.hideModal}
                >
                    <Input 
                        placeholder="请输入用户名" style={{marginBottom:'10px'}}
                        value={this.state.user}
                        onChange={this.changeUser}
                       
                    />
                    <Input 
                        placeholder="请输入密码" type="password" 
                        value={this.state.password}
                        onChange={this.changePassword}
                    />
                </Modal>

查阅了文档,还是设置不成功