我尝试在用户选择项目名称后弹出警告消息：＆＃39; MakeGray＆＃39;从下拉菜单中。但是，我甚至无法运行该功能。我在函数内部放置了一条警告消息，以便在访问它的瞬间运行，但是不会弹出这样的消息。
JS
app.controller('MainController',['$scope', '$http', 'API', function($scope, $http, API){
$scope.imageUrl = "";
$scope.template = "";
$scope.templates =[
{name: 'select an option...'},
{name: 'MakeGray', url:'opencv/MakeGray/MakeGray.html'},
{name: 'Canny'},
];
$scope.template = $scope.templates[0];
$scope.Opencv = function(template){
alert("HI");
if (template.name === 'MakeGray'){
alert("MAKEGRAY");
}
}
}]);
HTML
<html ng-app="app">
<head>
<meta charset="UTF-8">
<link rel="stylesheet" href="css/bootstrap.min.css" />
<link rel="stylesheet" href="css/opencv_css.css" />
</head>
<nav class="navbar navbar-default">
<div class="container"> <!-- top intro part -->
<div class="navbar-header">
<a class="navbar-brand" href="#/"> OPENCV 3.0.0</a>
</div>
<ul class="nav navbar-nav navbar-right">
<li><a href="#/"><i class="fa fa-home"></i> Home</a></li>
<li><a href="#/about"><i class="fa fa-shield"></i> About</a></li>
<li><a href="#/contact"><i class="fa fa-comment"></i> Contact</a></li>
</ul>
</div>
</nav>
<body ng-controller="MainController">
<div class="row"> <!-- Dropdown menu -->
<div class="col-md-20">
<div id="main">
<form class="form-horizontal" role="form">
<label class="control-label col-md-2">Filter List:</label>
<div class="col-md-5">
<select id="form_filter" class="form-control"
ng-model="template"
ng-options="t.name for t in templates" <!-- why did t.name as t for t in templates fail? -->
ng-change="Opencv(template)">
</select>
</div>
</form>
</div>
</div>
<input type="file" id="form_img" name="fileToUpload">
<button ng-click="add()">Upload</button>
</div>
<!--
Display Images here
moves images about 10 pixels below the upload button
-->
<br><br>
<div class="row">
<div class="col-md-push-2 col-sm-push-1 col-lg-push-1 col-md-8-col-sm-8 col-lg-6 text-warning">
<div id="imagesData">
<img id="img1" src="" alt="" class="data-image" />
</div>
</div>
<div id="imagesData">
<img id="img2" src="" alt="" class="data-image" />
</div>
</div>
<!--
Display html of selected opencv filter
-->
<br>
<div ng-include="template.url"></div>
<script src="js/jQuery.js"></script>
<script src="js/angular.js"></script>
<script src="js/ui-bootstrap-tpls-0.14.3.min.js"></script>
<script src="js/app.js"></script>
</body>
</html>
答案 0 :(得分：2)
问题是由HTML中的评论引起的：
<!-- why did t.name as t for t in templates fail? -->
删除它，一切都会按预期工作。
关于此评论中的问题，答案是：因为as之后的内容是选择框的标签，之前的是模型。所以你真的想要
t as t.name for t in templates
答案 1 :(得分：0)
尝试这样（ng-change =＆＃34; Opencv（）＆＃34; if if（$ scope.template ===＆＃39; MakeGray＆＃39;）） -
#include <stdio.h>
#include <string.h> //strlen
#include <stdlib.h> //strlen
#include <stdbool.h>
#include <time.h>
#include <sys/socket.h>
#include <arpa/inet.h> //inet_addr
#include <unistd.h> //write
#include <pthread.h> //for threading , link with lpthread
#define N 2 // player numbers
#define CardUpperLimit 10;
// Game setting
int n = 1000;
int flag_phase1 = 1;
pthread_t sniffer_thread[N];
char message[256] , client_message[2000];
int PHASE=0;
int player_index=0;
void *test(void *);
void error(char *msg)
{
perror(msg);
exit(1);
}
int main(int argc , char *argv[])
{
// Socket setting
int i,j;
int socket_desc , client_sock , c , *new_sock;
struct sockaddr_in server , client;
int whoesTurn;
//Create socket
socket_desc = socket(AF_INET , SOCK_STREAM , 0);
if (socket_desc == -1)
{
printf("Could not create socket");
}
puts("Socket created");
//Prepare the sockaddr_in structure
server.sin_family = AF_INET;
server.sin_addr.s_addr = INADDR_ANY;
server.sin_port = htons( 8888 );
//Bind
if( bind(socket_desc,(struct sockaddr *)&server , sizeof(server)) < 0)
{
perror("bind failed. Error");
return 1;
}
puts("Bind done");
//Listen
listen(socket_desc , 3);
c = sizeof(struct sockaddr_in);
//Accept and incoming connection
puts("Waiting for incoming connections...");
c = sizeof(struct sockaddr_in);
/* Prepare section.. */
while( (client_sock = accept(socket_desc, (struct sockaddr *)&client, (socklen_t*)&c)) )
{
puts("Connection accepted");
new_sock = malloc(1);
*new_sock = client_sock;
if( pthread_create( &sniffer_thread[player_index] , NULL , test , (void*) new_sock) < 0)
{
perror("could not create thread");
return 1;
}
player_index+=1;
// break if all players entry..
if ( player_index== N ) break;
}
printf("All players are in the game!\n");
/* Phase 1 ... */
PHASE=1;
for ( whoesTurn = 0; whoesTurn < N; whoesTurn++)
{
/* Communication! */
bzero(client_message, 256);
n=whoesTurn+1;
while(flag_phase1); // busy waiting until this thread function finish..
flag_phase1=1;
printf("Finish Communication!!\n");
}
n=0; // reset checking index
printf("First Phase done..\n");
/* Phase 2 .. */
PHASE+=1;
for (whoesTurn=0;whoesTurn < N; whoesTurn++)
{
/* Communication Part! */
bzero(client_message, 256);
n=whoesTurn+1;
while(flag_phase1) {usleep(100);} // busy waiting until this thread function finish..
flag_phase1=1;
printf("Finish Communication!!\n");
}
n=0;
PHASE=0;
while(1)
sleep(1);
if (client_sock < 0)
{
perror("accept failed");
return 1;
}
return 0;
}
void * test(void *socket_desc)
{
int i, j;
int sock = *(int*)socket_desc;
int read_size;
int player_index_handler = player_index;
while(1)
{
/* Communication */
if(n==player_index_handler)
{
printf("I am player:%d\n", player_index_handler);
if (PHASE==1)
*message = '1';
else if (PHASE==2)
*message = '2';
write(sock, message, strlen(message));
printf("[%d],Phase msg sent:%d\n", player_index_handler,atoi(message));
read_size = recv(sock , client_message , 2000 , 0);
printf("the client_message is:%s, from player %d\n", client_message, player_index_handler);
bzero(message,256);
// Finish works..
flag_phase1=0;
}
}
}
答案 2 :(得分：0)
这是工作Plunker
我刚刚更改了下面的下拉列表
<select ng-model="template" ng-change="Opencv(template)" ng-options="c as (c.url + ' - ' + c.name) for c in templates">
</select>