ios学习笔记之相册访问系统

#import"ViewController.h"

//遵守协议

@interfaceViewController

()

@property(nonatomic,strong)UIButton*userBtn;

@end

@implementationViewController

- (void)viewDidLoad {

[superviewDidLoad];

//所有的能看到的UI控件创建初始化方式都可以采用alloc initWithFrame

self.userBtn= [[UIButtonalloc]initWithFrame:CGRectMake(30,60,80,80)];

//设置颜色

self.userBtn.backgroundColor= [UIColorredColor];

//设置圆形半径

self.userBtn.layer.cornerRadius=40;

self.userBtn.layer.masksToBounds=YES;

//添加点击事件：去访问系统相信

[self.userBtnaddTarget:selfaction:@selector(setUserImage) forControlEvents:(UIControlEventTouchUpInside)];

//添加到屏幕上来

[self.viewaddSubview:self.userBtn];

}

//这个方法是协议UIImagePickerController里面的，选择图片结束的时候就会自动调用。

- (void)imagePickerController:(UIImagePickerController

*)picker didFinishPickingImage:(UIImage *)image editingInfo:(nullableNSDictionary *)editingInfo{

//设置头像

[self.userBtnsetBackgroundImage:image forState:(UIControlStateNormal)];

//将系统相册消失掉

[pickerdismissViewControllerAnimated:YEScompletion:nil];

//

}

//访问系统相册

-(void)setUserImage

{

//创建系统相册

UIImagePickerController*imagePicker =[[UIImagePickerControlleralloc]init];

//设置代理

imagePicker.delegate=self;

//弹出系统相册

[selfpresentViewController:imagePicker

animated:YEScompletion:nil];

}

- (void)didReceiveMemoryWarning{

[superdidReceiveMemoryWarning];

// Dispose of any resources that can be

recreated.

}

@end

��E����+�