iOS调用系统相册,相机上传头像的基本技巧

//头像点击事件

-(void)photoViewBtn{

UIActionSheet* sheet = [[UIActionSheet alloc

]initWithTitle:nil delegate:self cancelButtonTitle:@"取消" destructiveButtonTitle:nil otherButtonTitles:@"从手机相册里选择",
@"拍照", nil];

sheet.tag = 1001;

[sheet showInView:self.view];

}

#pragma mark - UIActionSheetDelegate

- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {

//头像

if (actionSheet.tag == 1001) {

if (0 == buttonIndex) {

[self LocalPhoto];

} else if (1 == buttonIndex) {

[self takePhoto];

}

}

}

//打开本地相册

-(void)LocalPhoto

{

UIImagePickerController *picker = [[UIImagePickerController alloc] init];

picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;

picker.delegate = self;

//设置选择后的图片可被编辑

picker.allowsEditing = YES;

[self presentViewController:picker animated:YES completion:nil];

}

//开始拍照

-(void)takePhoto

{

UIImagePickerControllerSourceType sourceType = UIImagePickerControllerSourceTypeCamera;

if ([UIImagePickerController isSourceTypeAvailable:sourceType])

{

UIImagePickerController *picker = [[UIImagePickerController alloc] init];

picker.sourceType = sourceType;

picker.delegate = self;

//设置拍照后的图片可被编辑

picker.allowsEditing = YES;

[self.view.window.rootViewController presentViewController:picker animated:YES completion:nil];

}else{

UIAlertView *al = [[UIAlertView alloc] initWithTitle:nil message:@"模拟器中无法打开照相机,请在真机中使用" delegate:nil cancelButtonTitle:nil
otherButtonTitles:@"确认", nil];

[al show];

}

}

- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated

{

for (UINavigationItem *item in navigationController.navigationBar.subviews) {

if ([item isKindOfClass:[UIButton class]]&&([item.title isEqualToString:@"取消"]||[item.title isEqualToString:@"Cancel"]))

{

UIButton *button = (UIButton *)item;

[button setTitle:@"取消" forState:UIControlStateNormal];

[button setTintColor:[UIColor blackColor]];

}

}

}

//当选择一张图片后进入这里

-(void)imagePickerController:(UIImagePickerController*)picker didFinishPickingMediaWithInfo:(NSDictionary *)info

{

NSString *type = [info objectForKey:UIImagePickerControllerMediaType];

//当选择的类型是图片

if ([type isEqualToString:@"public.image"])

{

// 2.取得的图片

UIImage *image = info[UIImagePickerControllerOriginalImage];

NSData *imageData = UIImageJPEGRepresentation(image, 1.0);

UIImage *img = [UIImage imageWithData:imageData];

UIImageView *imgView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 90, 90)];

imgView.image = img;

NSData *imgViewData = [self imageWithImage:imgView.image scaledToSize:CGSizeMake(90, 90)];

UIImage *suolue = [UIImage imageWithData:imgViewData]

//上传头像接口在这里调用

[picker dismissViewControllerAnimated:YES completion:nil];

}

}

//将图片缩略到指定大小

- (NSData *)imageWithImage:(UIImage*)image

scaledToSize:(CGSize)newSize;

{

UIGraphicsBeginImageContext(newSize);

[image drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];

UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

return UIImageJPEGRepresentation(newImage, 0.5);

}

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker

{

[picker dismissViewControllerAnimated:YES completion:nil];

}