以下是从实际项目中截取的例子，从一个button中启动获得相片
-(IBAction)blumbtnTap:(id)sender
{
// 判断是否支持相机
// UIAlertView *alertview;
// if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])
// {
// alertview=[[UIAlertView alloc] initWithTitle:@"提示" message:@"请选择" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"相册选择",@"相机拍照", nil];
// alertview.tag=859;
// [alertview show];
// [alertview release];
// }
// else {
//
// alertview=[[UIAlertView alloc] initWithTitle:@"提示" message:@"请选择" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"相册选择", nil];
// alertview.tag=859;
// [alertview show];
// [alertview release];
// }
UIActionSheet *sheet; // 判断是否支持相机
if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])
{
sheet = [[UIActionSheet alloc] initWithTitle:@"选择" delegate:self cancelButtonTitle:nil destructiveButtonTitle:@"取消" otherButtonTitles:@"拍照",@"从相册选择", nil];
}
else { sheet = [[UIActionSheet alloc] initWithTitle:@"选择" delegate:self cancelButtonTitle:nil destructiveButtonTitle:@"取消" otherButtonTitles:@"从相册选择", nil];
} sheet.tag = ; [sheet showInView:self.view]; } -(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if (buttonIndex==) {//取消 }
else if (buttonIndex==)//相册选择
{ }
else if (buttonIndex==)//相机拍照
{ }
NSLog(@"%d",buttonIndex);
}
#pragma mark - actionsheet delegate
-(void) actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
if (actionSheet.tag == ) { NSUInteger sourceType = ; // 判断是否支持相机
if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) { switch (buttonIndex) {
case :
// 取消
return;
case :
// 相机
sourceType = UIImagePickerControllerSourceTypeCamera;
break; case :
// 相册
sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
break;
}
}
else {
if (buttonIndex == ) {
return;
} else {
sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
}
}
// 跳转到相机或相册页面
UIImagePickerController *m_imagePicker = [[UIImagePickerController alloc] init];
if ([UIImagePickerController isSourceTypeAvailable:
UIImagePickerControllerSourceTypePhotoLibrary]) {
m_imagePicker.sourceType = sourceType; //UIImagePickerControllerSourceTypePhotoLibrary;
m_imagePicker.delegate = self;
[m_imagePicker setAllowsEditing:NO];
UIPopoverController *popover = [[UIPopoverController alloc] initWithContentViewController:m_imagePicker];
popoverController = popover;
[popoverController presentPopoverFromRect:CGRectMake(, , , ) inView:self.
view permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES]; }else {
UIAlertView *alert = [[UIAlertView alloc]initWithTitle:nil message:@"Error accessing photo library!"
delegate:nil cancelButtonTitle:@"Close" otherButtonTitles:nil];
[alert show];
[alert release];
}
}
} #pragma mark - 保存图片至沙盒
- (void) saveImage:(UIImage *)currentImage withName:(NSString *)imageName
{
NSData *imageData = UIImageJPEGRepresentation(currentImage, 0.5);
// 获取沙盒目录
NSString *fullPath = [[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"] stringByAppendingPathComponent:imageName];
// 将图片写入文件
[imageData writeToFile:fullPath atomically:NO];
} #pragma mark - image picker delegte
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
[picker dismissViewControllerAnimated:YES completion:^{}]; UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
ColorData *acolor=[GoodslistDataCls.colorList objectAtIndex:(currentSelectTag-DETAILDISHINFOVIEWSTARTTAG)];
NSString *imgName=[NSString stringWithFormat:@"%@_%@.png",GoodslistDataCls.goodInfo.goodscode,acolor.colorcode];
[self saveImage:image withName:imgName]; NSString *fullPath = [[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"] stringByAppendingPathComponent:imgName]; UIImage *savedImage = [[UIImage alloc] initWithContentsOfFile:fullPath]; isFullScreen = NO;
[imgView setImage:savedImage];
imgView.tag = ; [popoverController dismissPopoverAnimated:YES]; DishInfoView *aDishInfoView=(DishInfoView *)[self.view viewWithTag:(currentSelectTag)];
aDishInfoView.lblName.textColor=[UIColor redColor];
aDishInfoView.imgView.image=[self readImagewithName:imgName]; [delegate loadDishInfoImg:self.myTag];
}
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
[self dismissViewControllerAnimated:YES completion:^{}];
}