如何将一个方法与这个按钮关联起来？
我有一个显示图像和文本的导航栏按钮。这是代码：
UIImage *saveImage = [UIImage imageNamed:@"star.png"];
UIButton *saveButton = [UIButton buttonWithType:UIButtonTypeCustom];
[saveButton setBackgroundImage:saveImage forState:UIControlStateNormal];
[saveButton setTitle:@"Save" forState:UIControlStateNormal];
saveButton.frame = (CGRect) {
.size.width = 100,
.size.height = 30,
};
UIBarButtonItem *barButton= [[UIBarButtonItem alloc] initWithCustomView:saveButton];
[self.navigationItem setRightBarButtonItem:barButton animated:YES];
我尝试过
[barButton setAction:@selector(saveArray)];
，但不起作用。
I have a navigation bar button that displays both image and text. This is the code:
UIImage *saveImage = [UIImage imageNamed:@"star.png"];
UIButton *saveButton = [UIButton buttonWithType:UIButtonTypeCustom];
[saveButton setBackgroundImage:saveImage forState:UIControlStateNormal];
[saveButton setTitle:@"Save" forState:UIControlStateNormal];
saveButton.frame = (CGRect) {
.size.width = 100,
.size.height = 30,
};
UIBarButtonItem *barButton= [[UIBarButtonItem alloc] initWithCustomView:saveButton];
[self.navigationItem setRightBarButtonItem:barButton animated:YES];
I tried this
[barButton setAction:@selector(saveArray)];
but it doesn't work.
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请记住，您还必须指定目标。您可以将操作/目标设置为 UIButton 对象本身：
我尝试直接将目标/操作设置为 UIBarButtonItem，但由于某种原因，在 UIButton 用于自定义视图的情况下似乎不起作用。
Remember that you must specify target as well. You can set action/target to the UIButton object itself:
I've tried to set target/action to the UIBarButtonItem directly but it seems not to work in case of UIButton for custom view for some reason.
你记得设定目标吗？如果所需的方法属于同一个类，您可以这样做：
也就是说，
action和target都是属性（Obj-C 2.0 的新功能），请考虑使用点符号：Did you remember to set the target? If the desired method belongs to the same class, you could do:
That said,
actionandtargetare both properties (new to Obj-C 2.0), consider using the dot notation: