如何显示按钮的标签? [英] How show tag of button?

问题描述

在下面的代码中，我想在控制台上显示每个按钮的标签.我为此尝试过，但它显示超出范围.怎么办?

In below code i want display tag of each button on console. I tried for that but it show out of scope. How do that?

 - (void)loadView {
[super loadView];
self.view.backgroundColor = [UIColor redColor];
UIScrollView *scroll = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
scroll.pagingEnabled = YES;
NSInteger numberOfViews = 33;
[btnMenu setTag:0 ];
for (int i = 1; i < numberOfViews; i++) {
    CGFloat yOrigin = i * self.view.frame.size.width;
    UIView *awesomeView = [[UIView alloc] initWithFrame:CGRectMake(yOrigin, 0, self.view.frame.size.width, self.view.frame.size.height)];
    //awesomeView.backgroundColor = [UIColor colorWithRed:0.5/i green:0.5 blue:0.5 alpha:1];
    btnMenu = [UIButton buttonWithType:UIButtonTypeCustom];
    //NSData *data =UIImageJPEGRepresentation(, 1);
    [btnMenu setBackgroundImage:[UIImage imageNamed:[NSString stringWithFormat:@"page-%d.jpg",i]] forState:UIControlStateNormal];
    CGRect frame = btnMenu.frame;
    frame.size.width=320;
    frame.size.height=460;
    frame.origin.x=0;
    frame.origin.y=0;
    btnMenu.frame=frame;
    [btnMenu setTag:i];
    btnMenu.alpha = 1;
    [btnMenu addTarget:self action:@selector(btnSelected:) forControlEvents:UIControlEventTouchUpInside];
    [awesomeView addSubview:btnMenu];

    [scroll addSubview:awesomeView];
    [awesomeView release];
}
scroll.contentSize = CGSizeMake(self.view.frame.size.width * numberOfViews, self.view.frame.size.height);
[self.view addSubview:scroll];
[scroll release];

}

-(IBAction)btnSelected:(id)sender{
switch (btnMenu.tag) {
        NSLog(@"%d",btnMenu.tag);

}} 

推荐答案

试试这个:

-(IBAction)btnSelected:(id)sender{
  UIButton *button = (UIButton *)sender;
  int whichButton = button.tag;
  NSLog(@"Current TAG: %i", whichButton);
} 

您真的需要将该方法作为 IBAction 方法吗?

do you really need the method as an IBAction method?

你不能把它当作空的吗?

cannot you use it as a void one?

-(void)btnSelected:(id)sender{
  UIButton *button = (UIButton *)sender;
  int whichButton = button.tag;
  NSLog(@"Current TAG: %i", whichButton);
} 

这篇关于如何显示按钮的标签?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！