iPhone - 無法將int放入UIButton

我認爲這只是因爲我很累..但由於某種原因，我無法讓我的UIBUTTONS充滿了生成的數字。除答案外，這些數字是隨機生成的。我相信這很簡單。謝謝！iPhone - 無法將int放入UIButton

- (void)determineQ { 
    first = arc4random() % 1000; 
    second = arc4random() % 1000; 
    wrong1 = arc4random() % 1000; 
    wrong2 = arc4random() % 1000; 
    wrong3 = arc4random() % 1000; 
    while (first < second) { 
     first = arc4random() % 1000; 
    } 
    [question setText:[NSString stringWithFormat:@"%d - %d = ?", first, second]]; 
    answer = first - second; 
    NSLog(@"%d - %d = %d", first, second, answer); 
    correctLetter = arc4random() % 100; 
    if (correctLetter <= 25) { 
     [ans2 setTitle:[NSString stringWithFormat:@"%d", answer] forState:UIControlEventAllEvents]; 
     [ans2 setTitle:[NSString stringWithFormat:@"%d", wrong1] forState:UIControlEventAllEvents]; 
     [ans3 setTitle:[NSString stringWithFormat:@"%d", wrong2] forState:UIControlEventAllEvents]; 
     [ans4 setTitle:[NSString stringWithFormat:@"%d", wrong3] forState:UIControlEventAllEvents]; 
     NSLog(@"The answer is A"); 
    } else if (correctLetter <= 50) { 
     [ans1 setTitle:[NSString stringWithFormat:@"%d", wrong1] forState:UIControlEventAllEvents]; 
     [ans2 setTitle:[NSString stringWithFormat:@"%d", answer] forState:UIControlEventAllEvents]; 
     [ans3 setTitle:[NSString stringWithFormat:@"%d", wrong2] forState:UIControlEventAllEvents]; 
     [ans4 setTitle:[NSString stringWithFormat:@"%d", wrong3] forState:UIControlEventAllEvents]; 
     NSLog(@"The answer is B"); 
    } else if (correctLetter <= 75) { 
     [ans1 setTitle:[NSString stringWithFormat:@"%d", wrong1] forState:UIControlEventAllEvents]; 
     [ans2 setTitle:[NSString stringWithFormat:@"%d", wrong2] forState:UIControlEventAllEvents]; 
     [ans3 setTitle:[NSString stringWithFormat:@"%d", answer] forState:UIControlEventAllEvents]; 
     [ans4 setTitle:[NSString stringWithFormat:@"%d", wrong3] forState:UIControlEventAllEvents]; 
     NSLog(@"The answer is C"); 
    } else if (correctLetter <= 100) { 
     [ans1 setTitle:[NSString stringWithFormat:@"%d", wrong1] forState:UIControlEventAllEvents]; 
     [ans2 setTitle:[NSString stringWithFormat:@"%d", wrong2] forState:UIControlEventAllEvents]; 
     [ans3 setTitle:[NSString stringWithFormat:@"%d", wrong3] forState:UIControlEventAllEvents]; 
     [ans4 setTitle:[NSString stringWithFormat:@"%d", answer] forState:UIControlEventAllEvents]; 
     NSLog(@"The answer is D"); 
    } 
}

編輯：對不起，我不小心把UILabels，我的意思是UIButtons。

來源

2011-05-14 Alex Muller

你會得到什麼錯誤？不是'first'和'second'是一個float，因此應該是'[question setText：[NSString stringWithFormat：@「％。0f - ％.0f =？」，first，second]];' – simonbs

第一個和第二個是實際上是整數。 –

我想通了，我不應該一直在等待的forState控制事件，它應該是這個

[ans2 setTitle:[NSString stringWithFormat:@"%d", answer] forState:UIControlStateNormal];

來源

2011-05-15 15:25:50

Arcrandom產生浮動或雙，嘗試投各爲int這樣的：

[ans2 setTitle:[NSString stringWithFormat:@"%d", ((int)answer)] forState:UIControlEventAllEvents];

來源

2011-05-14 10:22:49 Roki

如果您正在使用UILabel。使用setText代替setTitle，

[ans2 settext:[NSString stringWithFormat:@"%d", answer]];

ans2.text = [NSString stringWithFormat:@"%d", answer];

來源

2011-05-14 10:26:45 Jhaliya

我的意思是UIButtons，不小心把UILabels：/ –

@Muller：好的，請在發佈問題時小心。 – Jhaliya

iPhone - 無法將int放入UIButton

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