我在Int数组中以秒为单位存储时间值,并尝试将其放在UILabel上,然后由countDown函数触发倒计时。我没有时间在每个单元格中倒计时,也无法在没有格式化原始秒值的情况下打印数组而不进行格式化,如下所示。现在我只能在每个单元格的UILabel上显示原始值:6532
(小时,分钟,秒)
我尝试在for loop
中单独打印数据时无法格式化数组,如下所示。该数组存储为Int。
在countDown函数中使用for循环时,我可以在日志中打印格式化的时间:HH:MM:SS
。但不是这样。
这是我的countDown函数:
func countDown() {
//timerInt is an array where I'm storing the Int values.
for i in 0 ..< timerInt.count {
let hours = timerInt[i] / 3600
let minsec = timerInt[i] % 3600
let minutes = minsec / 60
let seconds = minsec % 60
print(String(format: "%02d:%02d:%02d", hours, minutes, seconds))
timerInt[i]--
print(self.timerInt[i])
}
}
我试图在cellForRowAtIndexPath方法中执行此操作。 UILabel位于一个单独的类中:
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let myCell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as! cell
//This is the first item i'm posting on a UILabel and it works fine.
myCell.productName.text = productName[indexPath.row]
/*This cell/label I'm unable to format like in the for loop
which is formatted as a string*/
myCell.secondLabel.text = ("\(intArray[indePath.row])")
/*how do I format the intArray here so that the time
appears HH:MM:SS?? */
return myCell
}
我如何格式化intArray
以便将其打印到日志和UI作为格式化时间(HH:MM:SS),就像在for loop
中打印到日志时一样 String formatter ?
非常感谢任何帮助!
答案 0 :(得分:0)
您需要创建一个将秒转换为格式化字符串的函数,如
func formattedTime(seconds: Int = 0) -> String {
let hours = seconds/3600
let minsec = seconds%3600
let minutes = minsec / 60
let seconds = minsec % 60
return String(format: "%02d:%02d:%02d", hours, minutes, seconds)
}
使用此方法后,您可以在countDown
方法中使用此方法以及cellForRowAtIndexPath
func countDown() {
//timerInt is an array where I'm storing the Int values.
for i in 0 ..< timerInt.count {
print(formattedTime(timerInt[i]))
timerInt[i]--
print(self.timerInt[i])
}
}
在cellForRowAtIndexPath
内timerInt
为Int
数组,其中每个索引值都需要在单元格UILabel
上显示
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let myCell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as! cell
//This is the first item i'm posting on a UILabel and it works fine.
myCell.productName.text = productName[indexPath.row]
/*This cell/label I'm unable to format like in the for loop
which is formatted as a string*/
myCell.secondLabel.text = ("\(intArray[indePath.row])")
/*how do I format the intArray here so that the time
*/appears HH:MM:SS??
print(self.formattedTime(self.intArray[indePath.row]))
return myCell
}
答案 1 :(得分:0)
在@vacawama的帮助下,这最终为我工作了:
这就是我查询日期的方式,格式化日期将如何存储在数组中,然后将其放入名为intArray
的数组中。
var createdAt = object.createdAt 如果createdAt!= nil {
let calendar = NSCalendar.currentCalendar()
let comps = calendar.components([.Hour, .Minute, .Second], fromDate: createdAt as NSDate!)
let hour = comps.hour * 3600
let minute = comps.minute * 60
let seconds = comps.second
self.timerInt.append(hour + minute + seconds)
}
}
}
var timer = NSTimer.scheduledTimerWithTimeInterval(1, target: self, selector: Selector("countDown"), userInfo: nil, repeats: true)
})
self.tableView.reloadData()
}
其次,我确保将timer
变量保留在查询之外,以便计时器不会根据我查询的对象数量而倒计时。
我的countDown函数执行了所有格式化:
func countDown() {
//timerInt is an array where I'm storing the Int values.
for i in 0 ..< timerInt.count {
let hours = timerInt[i] / 3600
let minsec = timerInt[i] % 3600
let minutes = minsec / 60
let seconds = minsec % 60
print(String(format: "%02d:%02d:%02d", hours, minutes, seconds))
timerInt[i]--
self.tableView.reloadData()
}
}
在cellForRowAtIndexPath
函数中,我根据数组intArray
格式化了标签在UI上的显示方式,如下所示:
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let myCell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as! cell
//Formatting how the cell will be presented
let hours = timerInt[indexPath.row] / 3600
let minsec = timerInt[indexPath.row] % 3600
let minutes = minsec / 60
let seconds = minsec % 60
myCell.secondLabel.text = String(format: "%02d:%02d:%02d", hours, minutes, seconds)
}
一切都很完美,并按照需要显示:HH:MM:SS。