问题描述

通过编程创建多个复选框

在UIViewController中有一个UITextView，要对UITextView插入多个复选框。

怎么创建多个复选框,并且对这些复选框动态的创建方法？

目前代码如下：

-(void)Check
{
    CGPoint origin = note.frame.origin;
    NSString* head = [note.text substringToIndex:note.selectedRange.location];
    CGSize initialSize = [head sizeWithFont:note.font constrainedToSize:note.contentSize];
    NSUInteger startOfLine = [head length];

    NSString* tail = [head substringFromIndex:startOfLine];
    CGSize lineSize = [tail sizeWithFont:note.font forWidth:note.contentSize.width lineBreakMode:UILineBreakModeWordWrap];
    CGPoint cursor = origin;
    cursor.x += lineSize.width+15;
    cursor.y += initialSize.height - lineSize.height-130;

checkbox = [[UIButton alloc] initWithFrame:CGRectMake(cursor.x,cursor.y,15,15)];
    [checkbox setBackgroundImage:[UIImage imageNamed:@"unchk.png"]forState:UIControlStateNormal];
    [checkbox setBackgroundImage:[UIImage imageNamed:@"chk.png"]forState:UIControlStateSelected];
    [checkbox setBackgroundImage:[UIImage imageNamed:@"chk.png"]forState:UIControlStateHighlighted];
    checkbox.adjustsImageWhenHighlighted=YES;
    [checkbox addTarget:self action:@selector(ChkUnChk) forControlEvents:UIControlEventTouchUpInside];
    [note addSubview:checkbox];
}

-(void)ChkUnChk
{
    if(checkUnCheck==NO)
    {
        [checkbox setBackgroundImage:[UIImage imageNamed:@"chk.png"]forState:UIControlStateNormal];
        checkUnCheck=YES;
    }
    else if(checkUnCheck==YES)
    {
        [checkbox setBackgroundImage:[UIImage imageNamed:@"unchk.png"]forState:UIControlStateNormal];
        checkUnCheck=NO;
    }
}

-(void)checkboxSelected:(id)sender
{
    checkBoxSelected = !checkBoxSelected;
    [checkbox setSelected:checkBoxSelected];
}

其中note --> UITextView,checkbox --> UIButton

解决方案

用NSMutableArray

.h文件

NSMutableArray *selectedBtnarr;

.m文件

 - (void)viewDidLoad
   {
         selectedBtnarr=[NSMutableArray alloc]init];
   }

然后设置 UIButton的属性. 每个Button都有不同标签.

-(void)ChkUnChk:(id)sender
{

    UIButton *btn=(UIButton *)sender;
    NSString *Str=[NSString stringWithFormat:@"%d",btn.tag];
    BOOL flag=   [selectedBtnarr containsObject:Str];

    if (flag==YES)
    {
        [btn setBackgroundImage:[UIImage imageNamed:@"unchk.png"]    forState:UIControlStateNormal];
        [selectedBtnarr removeObject:Str];
    }
    else
    {
        [selectedBtnarr addObject:Str];
        [btn setBackgroundImage:[UIImage imageNamed:@"chk.png"] forState:UIControlStateNormal];
    }
}