//
// ViewController.m
//访问系统相册
//
// Created by lanou on 16/7/12.
// Copyright © 2016年lanou. All rights reserved.
//
#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：去访问系统相册
[self.userBtnaddTarget:selfaction:@selector(setUserImage)forControlEvents:(UIControlEventTouchUpInside)];
//将按钮添加到屏幕上来
[self.viewaddSubview:self.userBtn];
}
-(void)setUserImage
{
UIImagePickerController*imagePicker=[[UIImagePickerControlleralloc]init];
//设置代理，到@interface后面遵守协议
imagePicker.delegate=self;
//弹出系统相册
[selfpresentViewController:imagePickeranimated:YEScompletion:nil];
}
//这个方法是协议UIImagePickerControllerDelegate里面的，选择图片结束时候就会自动调用
- (void)imagePickerController:(UIImagePickerController*)picker didFinishPickingImage:(UIImage*)image editingInfo:(nullableNSDictionary *)editingInfo
{
//设置头像
[self.userBtnsetBackgroundImage:imageforState:(UIControlStateNormal)];
//将相册消失掉
[pickerdismissViewControllerAnimated:YEScompletion:nil];
}
- (void)didReceiveMemoryWarning {
[superdidReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
