[英]How to change tableView Cell button image on click in ios
可能重复:
我在表视图单元格中有按钮,使用此功能设置背景图像。
- (UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:
SectionsTableIdentifier];
cell.textLabel.text = self.names[self.keys];
if (cell.accessoryView == nil) {
UIImage *buttonUpImage = [UIImage imageNamed:@"button_up.png"];
UIImage *buttonDownImage = [UIImage imageNamed:@"button_down.png"];
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
[button setBackgroundImage:buttonUpImage
forState:UIControlStateNormal];
[button setBackgroundImage:buttonDownImage
forState:UIControlStateHighlighted];
[button setTitle:@"Send" forState:UIControlStateNormal];
[button sizeToFit];
[button addTarget:self
action:@selector(tappedButton:)
forControlEvents:UIControlEventTouchUpInside];
cell.accessoryView = button;
}
return cell;
}
Tapped Button的代码是:
- (void)tappedButton:(UIButton *)sender
{
NSInteger row = sender.tag;
// NSString *character = self.names[self.keys];
/* NSString *key = self.keys[indexPath.row];
NSArray *nameSection = self.names[key];
NSString *character = nameSection[indexPath];
*/
UIAlertView *alert = [[UIAlertView alloc]
initWithTitle:@"Request Notification."
message:[NSString
stringWithFormat:@"Friend Request Sent ."]
delegate:nil
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[alert show];
/* UIImage *buttonUpImage = [UIImage imageNamed:@"button.png"];
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
[cell.theSyncButton setImage:buttonUpImage forState:UIControlStateSelected];
[button setBackgroundImage:buttonUpImage
forState:UIControlStateNormal];
[button setTitle:@"Sent" forState:UIControlStateNormal];
[button sizeToFit];
*/
}
现在我要求的是当用户点击表视图单元格中的“发送”按钮时,动态地将背景颜色和标题更改为“已发送”。如何才能获得此功能?
试试这个,
- (UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
....
UIButton *button;
if (cell.accessoryView == nil) {
...
button = [UIButton buttonWithType:UIButtonTypeCustom];
....
cell.accessoryView = button;
}
button.tag = indexPath.row;
...
}
在tappedButton:
- (void)tappedButton:(UIButton *)sender
{
NSInteger row = sender.tag;
UIImage *buttonUpImage = [UIImage imageNamed:@"button.png"];
[sender setBackgroundImage:buttonUpImage
forState:UIControlStateNormal];
[sender setTitle:@"Sent" forState:UIControlStateNormal];
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:row inSection:0];
[self.tableView beginUpdates];
[self.tableView reloadRowsAtIndexPaths:[NSArray arrayWithObjects:indexPath, nil] withRowAnimation:UITableViewRowAnimationFade];
[self.tableView endUpdates];
}
嗨,你可以做到以下,
- (void)tappedButton:(UIButton *)sender
{
[sender setBackgroundColor:[UIColor grayColor]];
[sender setTitle:@"Sent" forState:UIControlStateNormal];
UIAlertView *alert = [[UIAlertView alloc]
initWithTitle:@"Request Notification."
message:[NSString
stringWithFormat:@"Friend Request Sent ."]
delegate:nil
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[alert show];
}
在您的IBAction方法tappedButton中,您传递了用户点击的按钮(“sender”参数。)
更改“发件人”的背景颜色和标题
使用选中的按钮状态,在
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
[button setTitle:@"Send" forState:UIControlStateNormal];
[button setBackgroundImage:original_image forState:UIControlStateNormal];
[button setTitle:@"Sent" forState:UIControlStateSelected];
[button setBackgroundImage:selected_image forState:UIControlStateSelected];
}
在tappedButton()
函数中使用[sender setSelected:YES]
将发件人设置为选中
这个approch的主要原因是你可以使用isSelected
方法检测按钮的状态。
[sender setBackgroundColor:[UIColor whiteColor]];
((UIButton *)sender).titleLabel.text = @"title";
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