顯示自定義UIButton時出現問題

Question

我試圖將自定義UIButton放在自定義UIView但沒有出現UIButton 。 盡管當我嘗試打印UIView UISubViews時，它在那里顯示了UIButton對象。

下面是我編寫的將按鈕放在自定義UIView上的代碼片段

- (id)initWithFrame:(CGRect)frame{
    self = [super initWithFrame:frame];
    if (self) {
        self.backgroundColor = [UIColor blackColor];
        self.headerLabel = [[UILabel alloc] initWithFrame:CGRectZero];
        self.headerLabel.backgroundColor = [UIColor clearColor];
        self.headerLabel.textColor = [UIColor whiteColor];
        self.headerLabel.font = [UIFont systemFontOfSize:kApplicationHeaderTextFont];
        [self addSubview:self.headerLabel];

        self.actionButton = [UIButton buttonWithType:UIButtonTypeCustom];
        self.actionButton.frame = CGRectZero;
        [self addSubview:self.actionButton];
    }
    return self;
}
- (void)drawRect:(CGRect)iTotalRect{
    if (self.actionButtonImage) {
        self.actionButton.frame = CGRectMake(self.frame.size.width - self.actionButtonImage.size.width - 10.0, self.frame.size.height / 2 - self.actionButtonImage.size.height / 2, self.actionButtonImage.size.width, self.actionButtonImage.size.height);
        [self.actionButton setImage:self.actionButtonImage forState:UIControlEventTouchUpInside];
    }

有人知道我在做什么錯嗎？

Answer 1

我的提示：

1.為什么不使用情節提要？

2.可能是alpha ?!

嘗試使用：

self.alpha = 1.0;

希望它有用：D

Answer 2

您需要為按鈕添加背景顏色-在您進行設置之前，該顏色為空。

Answer 3

所以我找到了你所需要的！

也許這：

 UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button addTarget:self 
           action:@selector(aMethod:)
 forControlEvents:UIControlEventTouchDown];
[button setTitle:@"Show View" forState:UIControlStateNormal];
button.frame = CGRectMake(80.0, 210.0, 160.0, 40.0);
[view addSubview:button];

現在您可以添加您的選項了！ 試試吧！

這是我應用程序中的一部分，您可以了解我的意思：

- (void)addMyButton{    // Method for creating button, with background image and other properties

    UIButton *playButton = [[UIButton buttonWithType:UIButtonTypeRoundedRect] retain];
    playButton.frame = CGRectMake(110.0, 360.0, 100.0, 30.0);
    [playButton setTitle:@"Play" forState:UIControlStateNormal];
    playButton.backgroundColor = [UIColor clearColor];
    [playButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal ];
    UIImage *buttonImageNormal = [UIImage imageNamed:@"blueButton.png"];
    UIImage *strechableButtonImageNormal = [buttonImageNormal stretchableImageWithLeftCapWidth:12 topCapHeight:0];
    [playButton setBackgroundImage:strechableButtonImageNormal forState:UIControlStateNormal];
    UIImage *buttonImagePressed = [UIImage imageNamed:@"whiteButton.png"];
    UIImage *strechableButtonImagePressed = [buttonImagePressed stretchableImageWithLeftCapWidth:12 topCapHeight:0];
    [playButton setBackgroundImage:strechableButtonImagePressed forState:UIControlStateHighlighted];
    [playButton addTarget:self action:@selector(playAction:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:playButton];  
}

好吧，我為您找到了最終的解決方案：

UIButton *btnTwo = [UIButton buttonWithType:UIButtonTypeRoundedRect]; 
btnTwo.frame = CGRectMake(40, 140, 240, 30);
[btnTwo setTitle:@"vc2:v1" forState:UIControlStateNormal];
btnImage = [UIImage imageNamed:@"image.png"];
[btnTwo setImage:btnImage forState:UIControlStateNormal];
[btnTwo addTarget:self action:@selector(goToOne) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btnTwo];

Answer 4

以下drawRect中的代碼為我工作。 因此，基本上，使用自定義按鈕不應設置圖像，而應設置背景圖像。

- (void)drawRect:(CGRect)iTotalRect
{
    if (self.actionButtonImage) {
        self.actionButton.frame = CGRectMake(self.frame.size.width - self.actionButtonImage.size.width - 10.0, self.frame.size.height / 2 - self.actionButtonImage.size.height / 2, self.actionButtonImage.size.width, self.actionButtonImage.size.height);
        [self.actionButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
        [self.actionButton setBackgroundImage:self.actionButtonImage forState:UIControlStateNormal];
    }

Answer 5

您的actionButton的initWithFrame在哪里？

抱歉，我懶得瀏覽我的代碼，但這是Internet上如何創建自定義按鈕的示例。

UIButton *playButton = [[UIButton buttonWithType:UIButtonTypeRoundedRect] retain];
playButton.frame = CGRectMake(110.0, 360.0, 100.0, 30.0);
[playButton setTitle:@"Play" forState:UIControlStateNormal];
playButton.backgroundColor = [UIColor clearColor];
[playButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal ];
UIImage *buttonImageNormal = [UIImage imageNamed:@"blueButton.png"];
UIImage *strechableButtonImageNormal = 
 [buttonImageNormal stretchableImageWithLeftCapWidth:12 topCapHeight:0];
[playButton setBackgroundImage:strechableButtonImageNormal forState:UIControlStateNormal];
UIImage *buttonImagePressed = [UIImage imageNamed:@"whiteButton.png"];
UIImage *strechableButtonImagePressed = 
[buttonImagePressed stretchableImageWithLeftCapWidth:12 topCapHeight:0];
[playButton addTarget:self 
action:@selector(playAction:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:playButton];

Answer 6

-initWithFrame:可能不會被調用，具體取決於您如何創建按鈕。 如果在.xib文件中創建按鈕，則-initWithCoder:可能會被調用。