关于iphone：如何删除多个UIButton或动态创建的特定UIButton？

How to delete multiple UIButton or particular UIButton dynamically created?

在我的应用程序中，单击一个uibutton，我需要动态创建多个uibuttons并为此执行方法。

如何从创建的uibuttons中删除特定uibutton？按退格键还是按删除键？还是有其他方法删除ui按钮？

用于创建的源代码

在.h文件中

1	NSMutableArray *selectedBtnarr;

在m文件中

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-(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 setTag:checkButtonCount];
[checkbox addTarget:self action:@selector(ChkUnChk:) forControlEvents:UIControlEventTouchUpInside];
[note addSubview:checkbox];

NSString *xAxis=[NSString stringWithFormat:@"%f" ,checkbox.frame.origin.x];
NSString *yAxis=[NSString stringWithFormat:@"%f" ,checkbox.frame.origin.y];
[chkBoxX addObject:xAxis];
[chkBoxY addObject:yAxis];
NSString *tag=[NSString stringWithFormat:@"%d" ,checkButtonCount];
[chkTag addObject:tag];
checkButtonCount=checkButtonCount+1;

}

-(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];
}
}

但我不知道怎么删除这个…

删除我的代码如下

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- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text
{
const char * _char = [text cStringUsingEncoding:NSUTF8StringEncoding];
int isBackSpace = strcmp(_char,"\b");

if (isBackSpace == -8)
{
NSLog(@"backspace Detected");

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;

NSLog(@"Cursor Place X : %f Y: %f",cursor.x,cursor.y);

int tagcoount=[chkTag count];

for(int a=0;a<tagcoount;a++)
{

NSString *tag=[NSString stringWithFormat:@"%@" ,[chkTag objectAtIndex:a]];

int chkcnt=[tag intValue];

if(cursor.x==checkbox.frame.origin.x && cursor.y==checkbox.frame.origin.y && a==checkbox.tag)
{
[[checkbox viewWithTag:chkcnt] removeFromSuperview];
[chkTag removeObjectAtIndex:chkcnt];

}
}
}

但它只删除最后一个ui按钮，当光标仅位于当前位置时也是如此。给我个好主意

相关讨论

根据您的要求：请从我的Mac项目(不是iOS)中获得这个想法，但您会觉得这很方便。

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@interface AppDelegate : NSObject <NSApplicationDelegate>

@property (assign) IBOutlet NSWindow *window;

@property(strong)NSMutableArray *buttons;
- (IBAction)add:(id)sender;
- (IBAction)remove:(id)sender;
@property (strong) IBOutlet NSPopUpButton *popUp;
@property (strong) IBOutlet NSView *buttonView;

@end

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@implementation AppDelegate

- (void)applicationDidFinishLaunching:(NSNotification *)aNotification{
_buttons=[NSMutableArray new];

}

-(void)clearButtonSubview{
for (NSInteger i=0; i<[[_buttonView subviews]count]; i++) {
NSView *view=[[_buttonView subviews]objectAtIndex:i];
[view removeFromSuperview];
}
}

-(void)drawButtons{

//when u add, remove prev drawn and redraw all.
[self clearButtonSubview];

for (NSInteger i=0; i<[_buttons count]; i++) {
NSButton *button=[_buttons objectAtIndex:i];
[button setFrame:NSMakeRect(i*55, 10, 50, 20)];
[_buttonView addSubview:button];

//add buttons in popup
[_popUp addItemWithTitle:[NSString stringWithFormat:@"%ld",button.tag]];
}

}

- (IBAction)add:(id)sender {

[_popUp removeAllItems];

NSButton *bttn=[NSButton new];
//get last button tag
NSInteger lastButtonTag=[[_buttons lastObject] tag];

[bttn setTag:lastButtonTag+1];
[bttn setTitle:[NSString stringWithFormat:@"%ld",[bttn tag]]];

[_buttons addObject:bttn];

[self drawButtons];
}

- (IBAction)remove:(id)sender {
NSInteger indexOfButtonToRemove;
NSString *selectedButton=[_popUp titleOfSelectedItem];

for (NSInteger index=0;index<[_buttons count];index++) {
NSButton *button=[_buttons objectAtIndex:index];

if ([[button title]isEqualToString:selectedButton]) {
indexOfButtonToRemove=index;
break;
}
}

[_buttons removeObjectAtIndex:indexOfButtonToRemove];
[_popUp removeItemAtIndex:indexOfButtonToRemove];

[self clearButtonSubview];
[self drawButtons];
}

@end