如何從另一個UIImageView中刪除UIImageView

Question

在touchesBegan方法中，我將stampBrush Image添加到drawImage，其中兩者都是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];

}

現在我想在removeStampBrush上逐一刪除點擊！ 哪個stampBrush需要從drawImage中刪除！

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



}

Answer 1

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

Answer 2

由於你想以相反的順序刪除標記，我會按如下方式擴展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

現在從你的觸摸事件調用[drawImage addStamp:stampBrush]並刪除最后一個[drawImage removeLastStamp]