所以我有一个带有按钮的UIScrollview
withUIImageView
设置,我希望能够在单击图像alertView
时弹出一个如果选择 YES 则该图像将在NSDocumentDirectory
. 我设法使 alertView 出现,但图像没有删除,因为我认为发送错误sender
或 button.tag。这是我的代码:
//我的滚动视图
UIScrollView *scrollView1 = [[UIScrollView alloc] initWithFrame:CGRectMake(0.0f,0.0f,300.0f,134.0f)];
[self.view addSubview:scrollView1];
int row = 0;
int column = 0;
for(int i = 0; i < _thumbs1.count; ++i) {
UIImage *thumb = [_thumbs1 objectAtIndex:i];
UIButton * button = [UIButton buttonWithType:UIButtonTypeCustom];
button.frame = CGRectMake(column*60+10, row*60+10, 60, 60);
[button setImage:thumb forState:UIControlStateNormal];
[button addTarget:self
action:@selector(buttonClicked:)
forControlEvents:UIControlEventTouchUpInside];
button.tag = i;
[scrollView1 addSubview:button];
if (column == 4) {
column = 0;
row++;
} else {
column++;
}
// 按钮
- (IBAction)buttonClicked:(id)sender {
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
NSInteger slotBG = [prefs integerForKey:@"integerKey"];
if(slotBG == 1){
UIAlertView *deleteMessage = [[UIAlertView alloc] initWithTitle:@""
message:@"DELETE?"
delegate:self
cancelButtonTitle:@"NO"
otherButtonTitles:@"YES", nil];
[deleteMessage show];
}
//对于我的警报视图
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
NSString *title = [alertView buttonTitleAtIndex:buttonIndex];
if([title isEqualToString:@"YES"]){
// I KNOW THIS IS SOMEWHAT WRONG BECAUSE OF THE SENDER having errors with it
UIButton *button = (UIButton *)sender;
[button removeFromSuperview];
[_images objectAtIndex:button.tag];
[_images removeObjectAtIndex:button.tag];
[_images insertObject:[NSNull null] atIndex:button.tag];
NSFileManager *fileManager = [NSFileManager defaultManager];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *fullPath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"oneSlotImages%lu.png", button.tag]];
[fileManager removeItemAtPath: fullPath error:NULL];
NSLog(@"image removed");
}
谢谢您的帮助。