UIAlertController *alertVc = [UIAlertController alertControllerWithTitle:nil message:nil preferredStyle:UIAlertControllerStyleActionSheet];
UIAlertAction *cancle = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction *_Nonnull action) { }]; UIAlertAction *camera = [UIAlertAction actionWithTitle:@"打开相机" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) { UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
imagePicker.delegate = self;
if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]){
imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
}
[self presentViewController:imagePicker animated:YEScompletion:nil]; }]; UIAlertAction *picture = [UIAlertAction actionWithTitle:@"打开相册" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) { UIImagePickerController *pickerImage = [[UIImagePickerController alloc] init];
if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]) {
pickerImage.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
pickerImage.mediaTypes = [UIImagePickerController availableMediaTypesForSourceType:pickerImage.sourceType]; }
pickerImage.delegate = self;
pickerImage.allowsEditing = NO; [self presentViewController:pickerImage animated:YEScompletion:nil];
}];
[alertVc addAction:cancle];
[alertVc addAction:camera];
[alertVc addAction:picture];
[self presentViewController:alertVc animated:YES completion:nil]; // 上面写到Button的点击事件方法里,下面直接复制就OK,记得遵守代理协议
UIImagePickerControllerDelegate, UINavigationControllerDelegate // 选择图片
- (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"])
{
//先把图片转成NSData
UIImage* image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];
NSData *data;
if (UIImagePNGRepresentation(image) ==nil)
{
data = UIImageJPEGRepresentation(image,1.0);
}
else
{
data = UIImagePNGRepresentation(image);
} //图片保存的路径
//这里将图片放在沙盒的documents文件夹中
NSString *DocumentsPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"]; //文件管理器
NSFileManager *fileManager = [NSFileManager defaultManager]; //把刚刚图片转换的data对象拷贝至沙盒中并保存为image.png
[fileManager createDirectoryAtPath:DocumentsPath withIntermediateDirectories:YES attributes:nil error:nil];
[fileManager createFileAtPath:[DocumentsPath stringByAppendingString:@"/userHeader.png"] contents:data attributes:nil]; //关闭相册界面
[picker dismissViewControllerAnimated:YEScompletion:nil]; //加在视图中
[self.mineView.headerButton setBackgroundImage:image forState:(UIControlStateNormal)]; }
}
// 取消选取图片
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
[picker dismissViewControllerAnimated:YEScompletion:nil];
}

也可以按照需求对UIAlertAction进行个性化设置,比如说改变字体颜色,字体大小等等

        UIAlertAction *cancle = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction *_Nonnull action) {

        }];

        //修改按钮文字颜色

        [cancle setValue:[UIColor yellowColor] forKey:@"titleTextColor"];

更多个性化设置可以参考下面资料

按钮的个性化设置

参考资料

05-07 15:18