<分区>
我正在 Xcode 中制作一个应用程序，我的目标是按下按钮时将运行一个方法。问题是第一次按下按钮时我想更改一个变量/NSString，所以下次按下它时它会做其他事情。顺便说一下，我有 375 种不同的方法可以使用，具体取决于变量名。
如果你能帮助我，我将不胜感激。
我还没有添加所有的方法
我的代码是
//
// Game.m
// Trivia in a Jar
//
// Created by Jayden Kelly on 12/11/2013.
// Copyright (c) 2013 Jaydz Media. All rights reserved.
//
#import "Game.h"
#import "Categories.h"
@interface Game ()
@end
@implementation Game
-(IBAction)AnswerLabel1:(id)sender{
Selected = [NSString stringWithFormat:@"%@", Answer1.currentTitle];
if ([Selected isEqualToString:CorrectAnswer]) {
NSString *name = @"Question8Science"; SEL selector = NSSelectorFromString(name); [self performSelector:selector];
}
else {
[self Question5Science];
}
}
-(IBAction)AnswerLabel2:(id)sender{
Selected = [NSString stringWithFormat:@"%@", Answer2.currentTitle];
if ([Selected isEqualToString:CorrectAnswer]) {
[self Question5Science];
}else {
[self Question5Science]; }
}
-(IBAction)AnswerLabel3:(id)sender{
Selected = [NSString stringWithFormat:@"%@", Answer3.currentTitle];
if ([Selected isEqualToString:CorrectAnswer]) {
[self Question5Science];
}else {
[self Question5Science];
}
}
-(void)Prepare{
QuestionLabel.text = [NSString stringWithFormat:@"%@", Question];
[Answer1 setTitle:[NSString stringWithFormat:@"%@",OAnswer1] forState:UIControlStateNormal];
[Answer2 setTitle:[NSString stringWithFormat:@"%@",OAnswer2] forState:UIControlStateNormal];
[Answer3 setTitle:[NSString stringWithFormat:@"%@",OAnswer3] forState:UIControlStateNormal];
}
-(void)Question{
}
-(void)Question1Science{
Question = [NSString stringWithFormat:@"What is the term used to explain the process of plant turning carbon dioxide to Oxygen?"];
OAnswer1 = [NSString stringWithFormat:@"Transpiration"];
OAnswer2 = [NSString stringWithFormat:@"Precipitation"];
OAnswer3 = [NSString stringWithFormat:@"Plants don’t turn carbon dioxide into Oxygen."];
CorrectAnswer = [NSString stringWithFormat:@"%@", OAnswer1];
[self Prepare];
}
-(void)Question2Science{
Question = [NSString stringWithFormat:@"The Metal Bronze is made by mixing Copper and What?"];
OAnswer1 = [NSString stringWithFormat:@"Copper and Aluminium"];
OAnswer2 = [NSString stringWithFormat:@"Copper and Iron"];
OAnswer3 = [NSString stringWithFormat:@"Copper and Tin"];
CorrectAnswer = [NSString stringWithFormat:@"Copper and Tin"];
[self Prepare];
}
-(void)Question3Science{
Question = [NSString stringWithFormat:@"What is the symbol for Water?"];
OAnswer1 = [NSString stringWithFormat:@"H2o"];
OAnswer2 = [NSString stringWithFormat:@"Co2"];
OAnswer3 = [NSString stringWithFormat:@"Wa"];
CorrectAnswer = [NSString stringWithFormat:@"H20"];
[self Prepare];
}
-(void)Question4Science{
Question = [NSString stringWithFormat:@"How many colours are in a rainbow?"];
OAnswer1 = [NSString stringWithFormat:@"6"];
OAnswer2 = [NSString stringWithFormat:@"7"];
OAnswer3 = [NSString stringWithFormat:@"8"];
CorrectAnswer = [NSString stringWithFormat:@"7"];
[self Prepare];
}
-(void)Question5Science{
Question = [NSString stringWithFormat:@"What is the Largest Internal Organ in the Human Body?"];
OAnswer1 = [NSString stringWithFormat:@"Liver"];
OAnswer2 = [NSString stringWithFormat:@"Heart"];
OAnswer3 = [NSString stringWithFormat:@"Lungs"];
CorrectAnswer = [NSString stringWithFormat:@"Liver"];
[self Prepare];
}
-(void)Question6Science{
Question = [NSString stringWithFormat:@"Popcorn Pops Because:"];
OAnswer1 = [NSString stringWithFormat:@"The water on the outside turns into steam and blows it up like a balloon"];
OAnswer2 = [NSString stringWithFormat:@"The there is a hole on the inside and when it gets hot it blown up and explodes"];
OAnswer3 = [NSString stringWithFormat:@"The Microwave sprays a magic ingredient and makes the popcorn grow magically"];
CorrectAnswer = [NSString stringWithFormat:@"The water on the outside turns into steam and blows it up like a balloon"];
[self Prepare];
}
-(void)Question7Science{
Question = [NSString stringWithFormat:@"How many Bones are in The Human Skeleton?"];
OAnswer1 = [NSString stringWithFormat:@"206"];
OAnswer2 = [NSString stringWithFormat:@"207"];
OAnswer3 = [NSString stringWithFormat:@"308"];
CorrectAnswer = [NSString stringWithFormat:@"206"];
[self Prepare];
}
-(void)Question8Science{
Question = [NSString stringWithFormat:@"The Cranium is also know as What Part of the Body?"];
OAnswer1 = [NSString stringWithFormat:@"Head"];
OAnswer2 = [NSString stringWithFormat:@"Leg"];
OAnswer3 = [NSString stringWithFormat:@"Finger"];
CorrectAnswer = [NSString stringWithFormat:@"Head"];
}
-(void)Question9Science{
Question = [NSString stringWithFormat:@"What part of the human body is the pupil located on?"];
OAnswer1 = [NSString stringWithFormat:@"Chest"];
OAnswer2 = [NSString stringWithFormat:@"Eye"];
OAnswer1 = [NSString stringWithFormat:@"Finger"];
CorrectAnswer = [NSString stringWithFormat:@"Eye"];
}
-(void)Question10Science{
Question = [NSString stringWithFormat:@"How many calories does water contain?"];
OAnswer1 = [NSString stringWithFormat:@"897 calories"];
OAnswer2 = [NSString stringWithFormat:@"0 calories"];
OAnswer3 = [NSString stringWithFormat:@"42 calories"];
CorrectAnswer = [NSString stringWithFormat:@"0 calories"];
}
-(void)Question11Science{
Question = [NSString stringWithFormat:@"What is the melting point for Iron?"];
OAnswer1 = [NSString stringWithFormat:@"1536°C"];
OAnswer2 = [NSString stringWithFormat:@"1537°C"];
OAnswer3 = [NSString stringWithFormat:@"1538°C"];
CorrectAnswer = [NSString stringWithFormat:@"1536°C"];
}
-(void)Question12Science{
Question = [NSString stringWithFormat:@"What is the melting point for Metal?"];
OAnswer1 = [NSString stringWithFormat:@"660°C"];
OAnswer2 = [NSString stringWithFormat:@"720°C"];
OAnswer3 = [NSString stringWithFormat:@"870°C"];
CorrectAnswer = [NSString stringWithFormat:@"660°C"];
}
-(void)Question13Science{
Question = [NSString stringWithFormat:@"Approximately how many bird species do we have in the world?"];
OAnswer1 = [NSString stringWithFormat:@"50"];
OAnswer2 = [NSString stringWithFormat:@"10,000"];
OAnswer3 = [NSString stringWithFormat:@"15,000"];
CorrectAnswer = [NSString stringWithFormat:@"10,000"];
}
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
Next = [NSString stringWithFormat:@"7Science"];
CategoryLabel.text = [NSString stringWithFormat:@"%@", SelectedCategory];
[self Question13Science];
// Do any additional setup after loading the view.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end