使用 UITableViewCellaccessoryView 成员的两个 UIButton 制作自定义 UIView 会导致无法识别的选择器发送到实例错误
我正在尝试为表格单元格附件视图创建一个带有两个按钮的视图，以对该单元格索引处的对象执行两个（显然）不同的操作。我在 RootViewController（UITableView 所在的位置）中使用选择器制作了两个基本的圆形矩形 UIButton。 方法中找到的单元格中初始化此视图的代码：
以下是我用来在cellForRowAtIndexPath UIButton* minus = [[UIButton buttonWithType:UIButtonTypeRoundedRect] 保留]; [减去 setFrame:CGRectMake(0, 0, 30, 30)]; [减去 setTitle:@"-" forState:UIControlStateNormal]; [减去 addTarget:self action:@selector(subtractOne:event:) forControlEvents:UIControlEventTouchDown]; UIButton* 加 = [[UIButton buttonWithType:UIButtonTypeRoundedRect] 保留]; [加上 setFrame:CGRectMake(30, 0, 30, 30)]; [加上 setTitle:@"+" forState:UIControlStateNormal]; [加上 addTarget:self 操作:@selector(addOne:event:) forControlEvents:UIControlEventTouchDown]; UIView* customAccessory = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 60, 30)]; [customAccessory addSubview:减]; [customAccessory addSubview:plus]; cell.accessoryView = customAccessory; [自定义配件发布]；
并且定义了他们调用的两个方法：
- (void)subtractOne:(id)sender forEvent:(UIEvent *)event; - (void)addOne:(id)sender forEvent:(UIEvent *)event; 任何想法
为什么这会引发发送到实例“RootViewController”的无法识别的发件人？
这是完整的错误：
2011-03-20 20:34:35.493 MyApp[23262:207] -[RootViewController minusOne:event:]: 无法识别的选择器发送到实例 0x573c350 2011-03-20 20:34:35.496 MyApp[23262:207] * 由于未捕获的异常“NSInvalidArgumentException”而终止应用程序，原因：“-[RootViewController minusOne:event:]：发送到无法识别的选择器实例 0x573c350'
I'm trying to make a view with two buttons for a table cell accessory view to do two (obviously) different things to the object at that cell index. I made two basic rounded rect UIButtons with a selector in the RootViewController (where the UITableView resides). Here is the code I use to initialize this view in a cell that is found in the cellForRowAtIndexPath method:
UIButton* minus = [[UIButton buttonWithType:UIButtonTypeRoundedRect] retain];
[minus setFrame:CGRectMake(0, 0, 30, 30)];
[minus setTitle:@"-" forState:UIControlStateNormal];
[minus addTarget:self action:@selector(subtractOne:event:) forControlEvents:UIControlEventTouchDown];
UIButton* plus = [[UIButton buttonWithType:UIButtonTypeRoundedRect] retain];
[plus setFrame:CGRectMake(30, 0, 30, 30)];
[plus setTitle:@"+" forState:UIControlStateNormal];
[plus addTarget:self action:@selector(addOne:event:) forControlEvents:UIControlEventTouchDown];
UIView* customAccessory = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 60, 30)];
[customAccessory addSubview:minus];
[customAccessory addSubview:plus];
cell.accessoryView = customAccessory;
[customAccessory release];
And the two methods they call are defined:
- (void)subtractOne:(id)sender forEvent:(UIEvent *)event;
- (void)addOne:(id)sender forEvent:(UIEvent *)event;
Any ideas why this would throw unrecognized sender sent to instance "RootViewController"?
Here is the full error:
2011-03-20 20:34:35.493 MyApp[23262:207] -[RootViewController subtractOne:event:]: unrecognized selector sent to instance 0x573c350
2011-03-20 20:34:35.496 MyApp[23262:207] * Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[RootViewController subtractOne:event:]: unrecognized selector sent to instance 0x573c350'
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意识到我自己的愚蠢错误：当我为subtractOne:forEvent编写方法时，试图调用subtractOne:event:：
Realized my own stupid mistake: Was trying to call on subtractOne:event: when I wrote method for subtractOne:forEvent: