Question

我是Ionic的新手，正试图将api从提供程序传递到应用程序的ts页面，但出现错误，也许是我传递了错误的id。

TS部分：

 export class CardsPage {
    currentItems: Item[];
    id: any;
    getData: Object;
    categories;
 constructor(public navCtrl: NavController, public api:Api, navParams: 
       NavParams, items: Items, public http: HttpClient) {
             this.id = navParams.get('idName') ||'';
             console.log(this.id); 
 this.api.getCategoryPosts(this.id).subscribe(data=>{
   console.log(data)
   this.getData = data
},err=>{
     console.log(err)
 })
 }
    openItem(item){
    this.navCtrl.push('ItemDetailPage', {
    itemName: item
  });
}

}

Api：

getCategoryPosts(category: any) {
      return this.http.get(`${this.api_url}/posts?categories=${category.id}`);
  }

我已经发布了有关API和ts文件的代码部分，现在我想使用参数将数据传递到下一页。我想知道应该传入什么参数才能在下一页显示数据

Answer 1

根据您的代码，您正在将ID直接传递给服务的import numpy as np import matplotlib.pyplot as plt import csv with open('titanic_data.csv') as file: reader = csv.reader(file) #Creates an empty list called ages, to be populated with our age data gender = [] survived = [] boysurvive = [] girlsurvive = [] count = 0 #loops throughpopulates our ages list with age data from titanic_data.csv for column in reader: gender.append(column[2]) survived.append(column[0]) gender.pop(0) survived.pop(0) for item in gender: if gender[count] == '1' and survived[count] == '1': girlsurvive.append(1) elif gender[count] == '1' and survived[count] == '0': girlsurvive.append(0) elif gender[count] == '0' and survived[count] == '1': boysurvive.append(1) elif gender[count] == '0' and survived[count] == '0': boysurvive.append(0) count = count + 1 range = [0,1] #Doesn't work #plt.scatter(range, girlsurvive) #plt.scatter(range, boysurvive) plt.show()方法。因此，请使用getCategoryPosts代替category，如下所示。

category.id

从ionic 3中的api传递参数

1 个答案: