Question

from tkinter import *

root = Tk()
root.title("End of year exam")

score = 0

def submit_button_clicked():
    global score
    global questions

    score = 0
    if answer.get() == questions[0][1]:
        score+=1
    else:
        score = score
    scoretxt.config(text = "Your score is: {}".format(str(score)))


questions =[("What does 13 + 5 = ?","18"),("What does 12 + 8 = ?","20"),("What does 19 + 6 = ?","25"),("What does 17 + 15 = ?","32")]

Label(root,text = "Question : ",bg ="light grey").grid(row = 0,column = 0, sticky = W)
question=Label(root,bg = "light green",text= questions[1][0], width = 38)
question.grid(row =1,column=0)

Label(root,text = "Answer: ",bg = "light grey").grid(row = 2, column = 0, sticky = W)
answer = Entry(root,bg ="white",width = 45, justify = CENTER)
answer.grid(row = 3,column=0)

scoretxt = Label(root,text ="Your score is:",bg = "light green", width = 38)
scoretxt.grid(row = 10,column = 0, sticky = W)

### make a submit button
Button(root,text= "Submit",bg = "light grey",command = submit_button_clicked).grid(row = 4,column = 0, sticky = W)

root.mainloop()

我一直收到错误func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell{ let cell: UITableViewCell = UITableViewCell(style: <#T##UITableViewCellStyle#>.Subtitle, reuseIdentifier: "test")。我也收到错误editor placeholder in source file。

Answer 1

你的文件中有一个编辑器占位符（编译器非常好地指出了它）。将错误行更改为：

let cell: UITableViewCell = UITableViewCell(style: .Subtitle, reuseIdentifier: "test")

Swift 2错误：源文件中的编辑器占位符

1 个答案: