我想创建this one推在推客般的按钮,虽然我的代码有一点不同:推后一个按钮,它的标题消失
UIButton* alertsButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
alertsButton.frame = CGRectMake(170, 43.5, 130, 130);
[alertsButton.titleLabel setFont:[UIFont fontWithName:@"Novecento wide" size:22]];
[alertsButton setTitle:NSLocalizedString(@"Alerts", nil) forState:UIControlStateHighlighted];
[alertsButton setTitle:NSLocalizedString(@"Alerts", nil) forState:UIControlStateNormal];
[alertsButton setTitle:NSLocalizedString(@"Alerts", nil) forState:UIControlStateSelected];
[alertsButton addTarget:self action:@selector(toggleAlerts:)forControlEvents:UIControlEventTouchUpInside];
-(void)toggleAlerts:(id)sender
{
UIButton *button = (UIButton *)sender;
if (button.selected) {
button.selected = NO;
[button setImage:[UIImage imageNamed:@"off.png"] forState:UIControlStateNormal];
[button.titleLabel setFont:[UIFont fontWithName:@"Novecento wide" size:22]];
NSLog(button.titleLabel.text);
} else {
button.selected = YES;
[button setImage:[UIImage imageNamed:@"on.png"] forState:UIControlStateNormal];
[button.titleLabel setFont:[UIFont fontWithName:@"Novecento wide" size:22]];
NSLog(button.titleLabel.text);
}
}
当我按下按钮,背景会按预期更改,但标签会消失,尽管文本显示在调试控制台中。我试图this没有结果:(