如何从另一个UIImageView中删除UIImageView

Question

在touchesBegan方法中，我将stampBrush Image添加到drawImage，其中两者都是UIImageView

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {

     stampBrush = [[UIImageView alloc] initWithImage:[[PaintColor stampImages] objectAtIndex:[stamp_Default integerForKey:STAMP_TYPE]]];

            [stampBrush setFrame:CGRectMake(lastPoint.x, lastPoint.y, stampBrush.image.size.width,stampBrush.image.size.height)];
            [drawImage addSubview:stampBrush];

}

现在我想在removeStampBrush上逐一删除点击！ 哪个stampBrush需要从drawImage中删除！

-(void)removeStampBrush:(UIButton *)sender{



}

Answer 1

if([stampBrush superView])
{
    [stampBrush removeFromSuperView];
}

Answer 2

由于你想以相反的顺序删除标记，我会按如下方式扩展UIImageView：

YourImageView.h

@interface YourImageView : UIImageView {
    NSMutableArray *stamps;
}

- (void)addStamp:(UIImageView *)stamp;
- (void)removeLastStamp;

@end

YourImageView.m

#import "YourImageView.h"

@implementation YourImageView

-(void)dealloc {
    [stamps release];

    [super dealloc];
}


- (void)addStamp:(UIImageView *)stamp {
    if (stamps == nil) {
        stamps = [[NSMutableArray array] retain];
    }

    [stamps addObject:stamp];
    [self addSubview:stamp];
}

- (void)removeLastStamp {
    if (stamps.count > 0) {
        UIImageView *stamp = [stamps lastObject];
        [stamp removeFromSuperview];

        [stamps removeLastObject];
    }
}

@end

现在从你的触摸事件调用[drawImage addStamp:stampBrush]并删除最后一个[drawImage removeLastStamp]