```
先要遵循协议{//全局的UITableView * tableView;
UIButton * button;}- (void)viewDidLoad {
[super viewDidLoad];
//给button大小根据需要设置
button = [UIButton buttonWithType:(UIButtonTypeRoundedRect)];
button.frame =CGRectMake(10, 10, 50, 50);
button.layer.cornerRadius = button.frame.size.width /2; button.clipsToBounds = YES;
[self UIButtonAction];
}
//把给button赋图片的代码抽成方法
-(void)UIButtonAction{
[button setBackgroundImage:[UIImage imageNamed:@"add.png"] forState:(UIControlStateNormal)];
//添加点击方法 [button addTarget:self action:@selector(buttonAction) forControlEvents:(UIControlEventTouchUpInside)];
[self.view addSubview:button]; }
//button的点击方法-(void)buttonAction{
UIAlertController * alertController = [UIAlertController alertControllerWithTitle:@"提示" message:@""preferredStyle:(UIAlertControllerStyleAlert)];
UIAlertAction * alert = [UIAlertAction actionWithTitle:@"取消" style:(UIAlertActionStyleDefault) handler:nil];UIAlertAction *deleteAction = [UIAlertAction actionWithTitle:@"相册" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
//调用相册方法 [self fromPhotos];
}];
UIAlertAction *archiveAction = [UIAlertAction actionWithTitle:@"相机" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
//调用相机的方法 [self fromCamera];
}];
UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"删除" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
//想要删除已经添加上的方法
[self UIButtonAction];
}];
[alertController addAction:deleteAction]; [alertController addAction:archiveAction]; [alertController addAction:cancelAction]; [alertController addAction:alert];
//推出视图
[self presentViewController:alertController animated:YES completion:nil];
}
//调用相册方法
-(void)fromPhotos{
//创建UIImagePickerController对象
UIImagePickerController *imp=[[UIImagePickerController alloc]init];
//设置UIImagePickerController类型(相册/相机/图片库) imp.sourceType=UIImagePickerControllerSourceTypeSavedPhotosAlbum;
//设置代理(目的:为了让这个对象执行协议中的方法)
imp.delegate=self;
//设置获取出来的照片是否可以编辑
imp.allowsEditing= YES;
//模态推出视图
[self presentViewController:imp animated:YES completion:nil]; }
-(void)fromCamera{
//先设定sourceType为相机，然后判断相机是否可用（ipod）没相机，不可用将sourceType设定为相片库
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 presentModalViewController:picker animated:YES];被废弃的
[self presentViewController:picker animated:YES completion:nil];
}
}
//点击图库中相片触发事件,并将点击德图片返回//当选择一张图片后进入这里-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary*)info{
NSString * type = [info objectForKey:UIImagePickerControllerMediaType];
if ([type isEqualToString:@"public.image"]) {
UIImage * originImage = [info objectForKey:@"UIImagePickerControllerEditedImage"];
//图片压缩，因为原图都是很大的，不必要传原图
UIImage * image = [self scaleImagr:originImage toScale:0.3];
NSData * data =[[ NSData alloc] init];
if (UIImagePNGRepresentation(image) == nil) {
data = UIImageJPEGRepresentation(image, 1.0);
}else{
data = UIImagePNGRepresentation(image);
}
// //关闭相册界面
// [picker dismissModalViewControllerAnimated:YES];弃用的
[picker dismissViewControllerAnimated:YES completion:nil];
UIImageView * imageV =[[UIImageView alloc] init];
imageV.layer.masksToBounds= YES;
imageV.layer.cornerRadius = 10;
imageV.image = image;
[button setBackgroundImage:image forState:(UIControlStateNormal)];
}
}
#pragma mark- 缩放图片
-(UIImage *)scaleImagr:(UIImage *)image toScale:(float)scaleSize{
UIGraphicsBeginImageContext(CGSizeMake(image.size.width * scaleSize, image.size.height * scaleSize));
[image drawInRect:CGRectMake(0, 0, image.size.width * scaleSize, image.size.height * scaleSize)];
UIImage *scledImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsPopContext();
return scledImage;
}
//相机中文
在项目的info.plist里面添加 Localized resources can be mixed YES（表示是否允许应用程序获取框架库内语言）
```
