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所以我正在计算器应用程序和我的代码目前不正确执行。我知道什么是错,但我不知道如何去解决它。目前,我有我的当前代码ViewController.m当我按下添加按钮:我没有正确执行我的push/pop方法,有人可以帮我吗?
#import "ViewController.h"
#import "CalcLogic.h"
@interface ViewController()
@property (weak, nonatomic) IBOutlet UILabel *display;
@property (weak, nonatomic) IBOutlet UILabel *lastOperation;
@property (strong, nonatomic) CalcLogic* logic;
@end
@implementation ViewController
double result = 0;
//Last operation entered into the calculator
NSString* lastEntered;
@synthesize logic;
-(IBAction)numPressed:(UIButton *)sender{
BOOL hasBeenCleared = [self.lastOperation.text isEqualToString:@"Clear"];
if ([self.display.text isEqualToString:@"0."]) {
self.display.text = sender.currentTitle;;
self.lastOperation.text = sender.currentTitle;;
[self.logic pushNumber:[sender.currentTitle doubleValue]];
}
else{
self.display.text = [self.display.text stringByAppendingString:sender.currentTitle];
if (self.lastOperation.text.length > 1 && hasBeenCleared != TRUE) {
self.lastOperation.text = [self.lastOperation.text stringByAppendingString:sender.currentTitle];
}
else {
self.lastOperation.text = sender.currentTitle;
}
[self.logic pushNumber:[sender.currentTitle doubleValue]];
}
}
-(IBAction)clearPressed:(UIButton *)sender{
self.display.text = @"0.";
self.lastOperation.text = @"Clear";
[self.logic clearStack];
result = 0;
}
-(IBAction)operation:(UIButton *)sender{
[logic pushOperation:sender.currentTitle];
NSString* resultString = [NSString stringWithFormat:@"%g", result];
self.display.text = resultString;
if ([self.lastOperation.text isEqualToString:@"Clear"]) {
self.lastOperation.text = @"";
self.lastOperation.text = [self.lastOperation.text stringByAppendingString:sender.currentTitle];
}
else{
self.lastOperation.text = [self.lastOperation.text stringByAppendingString:sender.currentTitle];
}
}
-(IBAction)equalHit:(UIButton *)sender{
result = [self.logic performOperation];
self.display.text = [NSString stringWithFormat:@"%g", result];
}
我的问题是压入和弹出对象数组。这些数组位于logic
,我试图将数字推送到logic
中的两个数组中的一个,并将运算符推送到对象中的另一个数组。但是,我必须做错事,因为我检入控制台时没有任何东西被推入(据我所知)。我对这种语言仍然陌生,并且来自Java包装。
既然被定义为公共财产,也许它是由外部类分配。否则就不需要公共财产。 – rmaddy 2013-02-27 18:23:57
@rmaddy公共财产有很多用途。就目前而言,他的代码没有证明对象正在被初始化,所以这是我第一个假设它为什么不起作用,如果你在代码中使用self.logic,那么没有'CalcLogic'类的进一步实现细节 – 2013-02-27 18:24:54
然后初始化它与自己像 self.logic = [[CalcLogic alloc] init]; – razibdeb 2013-02-27 18:27:39