objective-c - 选中抑制按钮时禁用 NSAlert 按钮

Question

我有一个带有 setShowsSuppressionButton:YES 的 NSAlert 复选框和两个名为 OK 和 Cancel 的按钮。每当我们单击(选中)抑制按钮时，如何使 Cancel 按钮变为禁用状态？

Answer 1

您需要禁用该按钮并设置 suppressionButton 的 action 和 target 属性:

alert = [[NSAlert alloc] init];
[alert setMessageText:@"text"];
[alert addButtonWithTitle:@"OK"];
[alert addButtonWithTitle:@"Cancel"];
[alert.buttons[0] setEnabled:NO];
[alert setShowsSuppressionButton:YES];
[alert.suppressionButton setTitle:@"You need to activate me first"];
[alert.suppressionButton setTarget:self];
[alert.suppressionButton setAction:@selector(selectClicked:)];
[alert runModal];

在操作处理程序中，您可以根据复选框的状态切换按钮的 enabled 属性:

-(IBAction)selectClicked:(NSButton *)sender {
    for (NSView *view in sender.superview.subviews) {
        if ([view isKindOfClass:[NSButton class]]) {
            NSButton *button = (NSButton *)view;
            if ([button.title isEqualToString:@"OK"]) {
                button.enabled = (sender.state == NSControlStateValueOn);
            }
        }
    }
}