一 ，ios8.0以后的新特性：
1，今天用到的时候才知道的新特性给大家分享一下；
2，UIAlertController = UIAlertView +
UIAlertSheet
3，二者合二为一了。
二，下面就用常用的上传头像实例，实战开始使用一下！！！
UIAlertController *alert = [UIAlertController
alertControllerWithTitle:@"添加照片" message:nil
preferredStyle:UIAlertControllerStyleActionSheet];//初始化一个标题为“选择时间”，风格是ActionSheet的UIAlertController，其中"\n"是为了给DatePicker腾出空间
UIAlertAction *cancel = [UIAlertActionactionWithTitle:@"取消" style:UIAlertActionStyleCancelhandler:^(UIAlertAction *action){ //点击确定按钮的事件处理 }];
UIAlertAction *camera =[UIAlertAction actionWithTitle:@"拍照"style:UIAlertActionStyleDefault handler:^(UIAlertAction *action){ //执行拍照代码
UIImagePickerControllerSourceType sourceType =UIImagePickerControllerSourceTypeCamera;
if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) { UIImagePickerController *picker = [[UIImagePickerController alloc]init]; picker.delegate =self; //设置拍照后的图片可被编辑 picker.allowsEditing =YES;
picker.sourceType =sourceType;
[self presentViewController:pickeranimated:YES completion:^{}];
}else
{
NSLog(@"模拟其中无法打开照相机,请在真机中使用");
}
}];
UIAlertAction *photo = [UIAlertActionactionWithTitle:@"从相册选择" style:UIAlertActionStyleDefaulthandler:^(UIAlertAction *action){
//执行从相册选择代码
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:YEScompletion:^{}];
}];
[alert addAction:camera];
[alertaddAction:photo];
[alertaddAction:cancel];
[selfpresentViewController:alert animated:YEScompletion:^{
}];
