ios - 如何使用for循环获取按钮标题

Question

        //here   take a array with letters 
        _englishArray = [[NSMutableArray alloc]initWithObjects:@"A",@"B",@"C",@"D",@"E",@"F",@"G",@"H",@"I",@"J",@"K",@"L",@"M",@"N",@"O",@"P",@"Q",@"R",@"S",@"T",@"U",@"V",@"W",@"X",@"Y",@"Z", nil];
        int i=0;
        float x=5,y=13;
        //add array elements as button title
        for (i=0; i< [_englishArray count]; i++) {
            button.tag=i+1;
            button = [UIButton buttonWithType:UIButtonTypeCustom];
            [button addTarget:self action:@selector(myAction:) forControlEvents:UIControlEventTouchUpInside];
            [button setTitle:[_englishArray objectAtIndex:i] forState:UIControlStateNormal];
            button.frame= CGRectMake(x, y, 29, 30);
            button.titleLabel.textColor =[UIColor whiteColor];
            x= x+31;
            if (x==320 || x>310) {
                x=5;
                y=y+40;
            }
            [_keyboardImageView addSubview:button];
        }


        //   and i add the each button to _keyboardImageView and set title as _english arry elements ...and the get buttons curren title for this code...
    //here get the button title useing for loop

   for (int j=0;j<=[_englishArray count]; j++) {
   //  here get button from image view by useing tag
            butt = (UIButton *)[_keyboardImageView viewWithTag:j+1];
            NSLog(@"%@",butt.titleLabel.text);
        }

它打印 null 不给按钮标题............注意:我也在使用 button.currentitle怎么可能..为什么它显示为空？

Answer 1

由于您使用setTitle:forState:设置了标题，因此使用titleForState:来获取标题:

NSLog(@"title is %@", [butt titleForState:UIControlStateNormal]);

当然，这假设 butt 不是 nil。分配按钮后需要分配按钮的标签:

button = [UIButton buttonWithType:UIButtonTypeCustom];
button.tag=i+1;