Json 单击时显示ngFor数组中的子内容

在我的项目中，屏幕上显示的每个卡片值都是使用ngFor从JSON循环过来的。理想的目标是，当用户单击一张卡时，它只显示JSON中关于该卡的信息，而用*ngIf显示my div中的内容。我创建了一个动画，以便在我希望显示内容的遮罩中淡入淡出。目前，如果你点击卡片，它只会显示缩略图阵列。我没有得到任何错误或任何事情继续下去。我孜孜不倦地寻找关于如何在单击时显示单个键的答案。我需要一次为一张卡显示卡的图像、名称和描述。我觉得自己遇到了路障，没有在谷歌上搜索正确的描述。如果我需要进一步澄清，请告诉我。感谢您提供的任何指导

    [
  {
    "id": 1,
    "content": [
      {
      "sin": "Vanity",
      "card": "/assets/img/vanity.jpg",
      "icon": "/assets/img/vanityIcon.jpg",
      "info": "In almost every list pride (or hubris or vanity) is considered the original and most serious of the seven deadly sins, and indeed the ultimate source from which the others arise. It is identified as a desire to be more important or attractive than others, failing to acknowledge the good work of others, and excessive love of self (especially holding self out of proper position toward God). Dante's definition was 'love of self perverted to hatred and contempt for one's neighbor.' In Jacob Bidermann's medieval miracle play, Cenodoxus, pride is the deadliest of all the sins and leads directly to the damnation of the titulary famed Parisian doctor. In perhaps the best-known example, the story of Lucifer, pride (his desire to compete with God) was what caused his fall from Heaven, and his resultant transformation into Satan. Vanity and narcissism are prime examples of this sin. In Dante's Divine Comedy, the penitents were forced to walk with stone slabs bearing down on their backs in order to induce feelings of humility."
      }
    ]
  },
  {
    "id": 2,
    "content": [
      {
      "sin": "Envy",
      "card": "/assets/img/envy.jpg",
      "icon": "/assets/img/envyIcon.jpg",
      "info": "Like greed, envy may be characterized by an insatiable desire; they differ, however, for two main reasons. First, greed is largely associated with material goods, whereas envy may apply more generally. Second, those who commit the sin of envy resent that another person has something they perceive themselves as lacking, and wish the other person to be deprived of it. Dante defined this as 'love of one's own good perverted to a desire to deprive other men of theirs.' In Dante's Purgatory, the punishment for the envious is to have their eyes sewn shut with wire because they have gained sinful pleasure from seeing others brought low. Aquinas described envy as 'sorrow for another's good'."
      }
    ]
  },
  {
    "id": 3,
    "content": [
      {
      "sin": "Sloth",
      "card": "/assets/img/sloth.jpg",
      "icon": "/assets/img/slothIcon.jpg",
      "info": "More than other sins, the definition of sloth has changed considerably since its original inclusion among the seven deadly sins. In fact it was first called the sin of sadness or despair. It had been in the early years of Christianity characterized by what modern writers would now describe as melancholy: apathy, depression, and joylessness — the last being viewed as being a refusal to enjoy the goodness of God and the world God created. Originally, its place was fulfilled by two other aspects, acedia and sadness. The former described a spiritual apathy that affected the faithful by discouraging them from their religious work. Sadness (tristitia in Latin) described a feeling of dissatisfaction or discontent, which caused unhappiness with one's current situation. When Thomas Aquinas selected acedia for his list, he described it as an 'uneasiness of the mind', being a progenitor for lesser sins such as restlessness and instability. Dante refined this definition further, describing sloth as being the 'failure to love God with all one's heart, all one's mind and all one's soul.' He also described it as the middle sin, and as such was the only sin characterised by an absence or insufficiency of love. In his 'Purgatorio', the slothful penitents were made to run continuously at top speed."
      }
    ]
  },
  {
    "id": 4,
    "content": [
      {
      "sin": "Wrath",
      "card": "/assets/img/wrath.jpg",
      "icon": "/assets/img/wrathIcon.jpg",
      "info": "Wrath (or anger or 'Rage') may be described as inordinate and uncontrolled feelings of hatred and anger. These feelings can manifest as vehement denial of the truth, both to others and in the form of self-denial, impatience with the procedure of law, and the desire to seek revenge outside of the workings of the justice system (such as engaging in vigilantism) and generally wishing to do evil or harm to others. The transgressions borne of vengeance are among the most serious, including murder, assault, and in extreme cases, genocide. Wrath is the only sin not necessarily associated with selfishness or self-interest (although one can of course be wrathful for selfish reasons, such as jealousy, closely related to the sin of envy). Dante described vengeance as 'love of justice perverted to revenge and spite'. In its original form, the sin of wrath also encompassed anger pointed internally rather than externally. Thus suicide was deemed as the ultimate, albeit tragic, expression of wrath directed inwardly, a final rejection of God's gifts."
      }
    ]
  },
  {
    "id": 5,
    "content": [
      {
      "sin": "Lust",
      "card": "/assets/img/lust.jpg",
      "icon": "/assets/img/lustIcon.jpg",
      "info": "Lust (or lechery) is usually thought of as excessive thoughts or desires of a sexual nature. Giving in to lusts can lead to sexual or sociological compulsions and/or transgressions including (but not limited to) sexual addiction, fornication, adultery, bestiality, rape, perversion, and incest. Dante's criterion was 'excessive love of others', which therefore rendered love and devotion to God as secondary. In 'Purgatorio', the penitent walks within flames to purge himself of lustful/sexual thoughts and feelings."
      }
    ]
  },
  {
    "id": 6,
    "content": [
      {
      "sin": "Gluttony",
      "card": "/assets/img/gluttony.jpg",
      "icon": "/assets/img/gluttonyIcon.jpg",
      "info": "Derived from the Latin gluttire, meaning to gulp down or swallow, gluttony is the over-indulgence and over-consumption of anything to the point of waste. In the Christian religions, it is considered a sin because of the excessive desire for food, or its withholding from the needy. Depending on the culture, it can be seen as either a vice or a sign of status. Where food is relatively scarce, being able to eat well might be something to take pride in (although this can also result in a moral backlash when confronted with the reality of those less fortunate). Where food is routinely plentiful, it may be considered a sign of self-control to resist the temptation to over-indulge."
      }
    ]
  },
  {
    "id": 7,
    "content": [
      {
      "sin": "Greed",
      "card": "/assets/img/greed.jpg",
      "icon": "/assets/img/greedIcon.jpg",
      "info": "Greed (or avarice, covetousness) is, like lust and gluttony, a sin of excess. However, greed (as seen by the church) is applied to the acquisition of wealth in particular. St. Thomas Aquinas wrote that greed was 'a sin against God, just as all mortal sins, in as much as man condemns things eternal for the sake of temporal things.'' In Dante's Purgatory, the penitents were bound and laid face down on the ground for having concentrated too much on earthly thoughts. 'Avarice' is more of a blanket term that can describe many other examples of greedy behavior. These include disloyalty, deliberate betrayal, or treason,[citations needed] especially for personal gain, for example through bribery . Scavenging[citation needed] and hoarding of materials or objects, theft and robbery, especially by means of violence, trickery, or manipulation of authority are all actions that may be inspired by greed. Such misdeeds can include simony, where one profits from soliciting goods within the actual confines of a church."
      }
    ]
  }
]

（更新为包含完整的JSON）

这是添加卡片阵列持有者时的当前状态=[]；在我的切换卡中，这个.cards[i]=！这张卡片[我]； 第二个图像是每个卡的所需状态。

---

您的切换功能不正确

您正在将索引

i

作为模板

中的参数发送（单击）=“toggleCard（i）”

，但未将其捕获到组件中

您应该捕获该索引

i

，因为它唯一地标识单击的卡。如果没有，您如何知道单击了哪张卡

toggleCard(var i) {
  // Handle click event.
}

此外，您只需使用一个

卡

变量来切换所有卡的状态。因此，如果单击一张卡，则显示或隐藏所有卡，而不仅仅是单击的卡

您应该有一个数组

cards[]

，它接受

布尔值并跟踪每张卡的切换状态

在您的
toggleCard（）
函数中，每当单击一张卡时，根据您接收的索引
i
在此数组中切换适当的值

var cards = [];  // Initialize with boolean values. 
                 // Array length would be equal to the number of your cards.   

toggleCard(var i) {
  this.cards[i] = !this.cards[i];
}

编辑：

关于实施建议更改后的问题：

在您的：


您正在将
selectedCard
初始化为
false
，但此变量采用
number
值。这不应该是一个问题，因为JavaScript允许动态类型
此语句中有一个打字错误
sin
，而不是
sins
，
{{sin.content.sin}
。它应该是
{{sins.content.sin}


修好这些，你就会看到所有的卡片。
我试过这个，以前试过稍微不同的方法。当我像你描述的那样设置它时，当页面加载时，我得到的只是菜单上遮罩中的缩略图。考虑提供一个链接到您的代码上或类似的网站。但看起来你就快到了。遵循@Kirill Simonov的解决方案，并将其与我的解决方案结合起来，以切换仅点击的卡片。在@Kirill Simonov更新评论后，我创建了一个StackBlitz。我用建议的更改更新了项目，现在它只显示“虚荣”的内容，如果我重新添加[ngStyle]=“rotateCards（）”，它会将所有卡片放回屏幕上，但只有“虚荣”仍然是唯一有效的选择。这是StackBlitz-。还有推荐的文档吗？我试着找些东西。谢谢大家!@RyanIndustries 8-查看我编辑的答案。我不认为会有关于创建子列表之类的明确文档，因为大多数子列表都可以使用构建块来构建，如
*ngFor
、单击事件处理程序等，这些都会在文档中提到。但在创建列表时，请查看这一点。您还可以在网上找到许多其他教程和资源。
toggleCard(var i) {
  // Handle click event.
}

var cards = [];  // Initialize with boolean values. 
                 // Array length would be equal to the number of your cards.   

toggleCard(var i) {
  this.cards[i] = !this.cards[i];
}