如何在IOS中使用Cordova插件

一、准备

插件功能：打开IOS相机

1:创建插件

plugman create --name [插件名称] --plugin_id [插件ID] --plugin_version [插件版本号]
plugman create --name CameraDemo --plugin_id cordova-plugin-camerademo --plugin_version 1.0.0

2:添加IOS平台

plugman platform add --platform_name ios

3:创建package.json文件

以下两种都可以生成package.json
1：使用命令 “npm init” 创建package.json文件
2：plugman createpackagejson [插件路径]
原应用使用的ionic UI框架，没有package.json无法安装插件

最终插件目录结构

除了ViewController.h和ViewController.m文件，其余的文件通过上述步骤都会自动生成

二、过程

创建文件ViewController.h和ViewController.m
ViewController.h

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController{
}
@property (nonatomic,strong) UIImagePickerController *imagePicker;
- (void)getDeviceInfo;  //获取ios设备信息
- (void)OpenCamera;		//打开ios相机
@end

ViewController.m

#import "ViewController.h"

@interface ViewController ()
@end

@implementation ViewController
- (id) init{
    NSLog(@"=======================相机初始化");
    self = [super init];
    self.imagePicker = [[UIImagePickerController alloc] init];
    return self;
}

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.

    UIButton *button =[[UIButton alloc]init];
    [button setTitle:@"我是按钮" forState:(UIControlStateNormal)];
    [button setTitleColor:[UIColor redColor] forState:(UIControlStateNormal)];
    [button setTitleColor:[UIColor blueColor] forState:(UIControlStateHighlighted)];
    [button setBackgroundColor:[UIColor yellowColor]];
    [button setFrame:CGRectMake(10, 50, 100, 30)];
    //事件
    //[button addTarget:self action:@selector(click) forControlEvents:(UIControlEventTouchUpInside)];
    [self.view addSubview:button];

    UIButton *deviceBtn =[[UIButton alloc]init];
    [deviceBtn setTitle:@"查看设备信息" forState:(UIControlStateNormal)];
    [deviceBtn setTitleColor:[UIColor redColor] forState:(UIControlStateNormal)];
    [deviceBtn setTitleColor:[UIColor blueColor] forState:(UIControlStateHighlighted)];
    [deviceBtn setBackgroundColor:[UIColor yellowColor]];
    [deviceBtn setFrame:CGRectMake(120, 50, 200, 30)];
    [deviceBtn addTarget:self action:@selector(getDeviceInfo) forControlEvents:(UIControlEventTouchUpInside)];
    [self.view addSubview:deviceBtn];

    UIButton *openCameraBtn =[[UIButton alloc]init];
    [openCameraBtn setTitle:@"打开相机" forState:(UIControlStateNormal)];
    [openCameraBtn setTitleColor:[UIColor redColor] forState:(UIControlStateNormal)];
    [openCameraBtn setTitleColor:[UIColor blueColor] forState:(UIControlStateHighlighted)];
    [openCameraBtn setBackgroundColor:[UIColor yellowColor]];
    [openCameraBtn setFrame:CGRectMake(330, 50, 200, 30)];
    [openCameraBtn addTarget:self action:@selector(openCamera) forControlEvents:(UIControlEventTouchUpInside)];
    [self.view addSubview:openCameraBtn];

}

- (void)getDeviceInfo{
    NSLog(@"获取设备信息。。。。");
    NSString *name = [[UIDevice currentDevice] name];
    NSString *systemName = [[UIDevice currentDevice] systemName];
    NSString *systemVersion = [[UIDevice currentDevice] systemVersion];
    NSString *model = [[UIDevice currentDevice] model];
    NSString *localizeModel = [[UIDevice currentDevice] localizedModel];

    UILabel *nameL = [[UILabel alloc] init];
    UILabel *systemNameL = [[UILabel alloc] init];
    UILabel *systemVersionL = [[UILabel alloc] init];
    UILabel *modelL = [[UILabel alloc] init];
    UILabel *localizeModelL = [[UILabel alloc] init];

    [nameL setText:name];
    [systemNameL setText:systemName];
    [systemVersionL setText:systemVersion];
    [modelL setText:model];
    [localizeModelL setText:localizeModel];

    [nameL setTextColor:[UIColor blueColor]];
    [systemNameL setTextColor:[UIColor blueColor]];
    [systemVersionL setTextColor:[UIColor blueColor]];
    [modelL setTextColor:[UIColor blueColor]];
    [localizeModelL setTextColor:[UIColor blueColor]];

    CGFloat x = 10;
    CGFloat y = 80;
    CGFloat width = 200;
    CGFloat height=20;

    nameL.frame = CGRectMake(x, y+20, width, height);
    systemNameL.frame = CGRectMake(x, y+40, width, height);
    systemVersionL.frame = CGRectMake(x, y+60, width, height);
    modelL.frame = CGRectMake(x, y+80, width, height);
    localizeModelL.frame = CGRectMake(x, y+100, width, height);

    [self.view addSubview:nameL];
    [self.view addSubview:systemNameL];
    [self.view addSubview:systemVersionL];
    [self.view addSubview:modelL];
    [self.view addSubview:localizeModelL];
}

- (void)openCamera{
    //NSLog(@"打开摄像头。。。。");
    //UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
    self.imagePicker.editing = YES;
    self.imagePicker.delegate = self;
    self.imagePicker.allowsEditing = YES;

    if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]){
        NSLog(@"选择相机。。。");
        self.imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
    }

    [self presentViewController:self.imagePicker animated:YES completion:nil];
}
@end

这两个文件其实是我已经在ios原生项目下编译运行过的文件，然后被CameraDemo.m调用。(其实有点类似于库的作用)

直白一点就是。有一个库(ViewController.h和ViewController.m)，提供了一个类ViewController，这个类提供了两个方法

• (void)getDeviceInfo; //获取ios设备信息
• (void)OpenCamera; //打开ios相机

然后CameraDemo.m去实例化了这个类
CameraDemo.m

/********* CameraDemo.m Cordova Plugin Implementation *******/

#import <Cordova/CDV.h>
#import "ViewController.h"

//这里必须继承CDVPlugin 类，表示CameraDemo是Cordova插件类
@interface CameraDemo : CDVPlugin {
  // Member variables go here.
}
@property (nonatomic,strong) ViewController *view;  //声明一个ViewController
- (void)coolMethod:(CDVInvokedUrlCommand*)command;  //创建插件自带的方法，可以删除
- (void)openCamera:(CDVInvokedUrlCommand*)command;
@end

@implementation CameraDemo

- (void)pluginInitialize{
    NSLog(@"===========================初始化CameraDemo");
    [super pluginInitialize];
    // 实例化ViewController
    self.view = [[ViewController alloc] init];
}

//创建插件自带的方法，可以删除
- (void)coolMethod:(CDVInvokedUrlCommand*)command
{
    CDVPluginResult* pluginResult = nil;
    NSString* echo = [command.arguments objectAtIndex:0];

    if (echo != nil && [echo length] > 0) {
        pluginResult = [CDVPluginResult resultWithStatus:CDVCommandStatus_OK messageAsString:echo];
    } else {
        pluginResult = [CDVPluginResult resultWithStatus:CDVCommandStatus_ERROR];
    }

    [self.commandDelegate sendPluginResult:pluginResult callbackId:command.callbackId];
}

- (void)openCamera:(CDVInvokedUrlCommand*)command
{
	// 将ViewController的实例viewController  显示出来
    [self.viewController presentViewController:self.view animated:YES completion:nil];
    //ViewController *view = [[ViewController alloc] init];
    //[view openCamera];
    //CDVPluginResult* pluginResult = [CDVPluginResult resultWithStatus:CDVCommandStatus_ERROR];;
    //[self.commandDelegate sendPluginResult:pluginResult callbackId:command.callbackId];
}
@end

CameraDemo.js

var exec = require('cordova/exec');

exports.coolMethod = function (arg0, success, error) {
    exec(success, error, 'CameraDemo', 'coolMethod', [arg0]);
};

exports.openCamera = function (arg0, success, error) {
    exec(success, error, 'CameraDemo', 'openCamera', [arg0]);
};

plugin.xml (这个文件非常非常的重要，js可以调用oc全靠它，多查查资料)

<?xml version='1.0' encoding='utf-8'?>
<plugin id="cordova-plugin-camerademo" version="1.0.0"
    xmlns="http://apache.org/cordova/ns/plugins/1.0"
    xmlns:android="http://schemas.android.com/apk/res/android">
    <name>CameraDemo</name>
    <js-module name="CameraDemo" src="www/CameraDemo.js">
        <clobbers target="cordova.plugins.CameraDemo" />
    </js-module>

    <platform name="ios">
        <config-file parent="/*" target="config.xml">
            <feature name="CameraDemo">
                <param name="ios-package" value="CameraDemo" onload="true"/>
            </feature>
        </config-file>
        <source-file src="src/ios/CameraDemo.m" />
        <header-file src="src/ios/ViewController.h" />
        <source-file src="src/ios/ViewController.m" />
    </platform>
</plugin>

package.json (一般不需要修改)

{
  "name": "cordova-plugin-camerademo",
  "version": "1.0.0",
  "description": "",
  "cordova": {
    "id": "cordova-plugin-camerademo",
    "platforms": [
      "ios"
    ]
  },
  "keywords": [
    "ecosystem:cordova",
    "cordova-ios"
  ],
  "author": "",
  "license": "ISC"
}

CameraDemo.js 通过 plugin.xml 配置去调用了原生的ocject-c方法

最后

Cordova项目调用插件

重要，如果调用和插件中的plugin.xml配置有关，所以plugin.xml非常重要

// 在项目的 ts文件中调用
declare let cordova:any
cordova.plugins.CameraDemo.openCamera();

以上就是如何在IOS中使用Cordova插件的详细内容，更多关于IOS使用Cordova的资料请关注我们其它相关文章！