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//
// ViewController.m
// QQUI
//
// Created by kevin_dfg on 16/4/12.
// Copyright © 2016年 kevin_dfg. All rights reserved.
//
#import "ViewController.h"
//屏幕宽高
#define ScreenWidth self.view.frame.size.width
#define ScreenHeight self.view.frame.size.height
//qq头像的宽高
#define QQHeadX (ScreenWidth-0.25*ScreenWidth)/2
#define QQHeadY 80
#define QQHeadWidth 0.25*ScreenWidth
#define QQHeadHeight 0.25*ScreenWidth
//账号的宽高
#define AccountX 0
#define AccountY QQHeadY+QQHeadHeight+20
#define AccountW ScreenWidth
#define AccountH 50
//密码的宽高
#define PasswordX 0
#define PasswordY AccountY+50
#define PasswordW ScreenWidth
#define PasswordH 50
//登陆的宽高
#define LoginX 35
#define LoginY PasswordY+PasswordH+20
#define LoginW ScreenWidth-2*LoginX
#define LoginH 50
//无法登陆？
#define FailedX 5
#define FailedY 0.95*ScreenHeight
#define FailedW 80
#define FailedH 25
//新用户
#define NewX 0.8*ScreenWidth
#define NewY 0.95*ScreenHeight
#define NewW 80
#define NewH 25
//图片选择器协议
@interface ViewController ()<UINavigationControllerDelegate, UIImagePickerControllerDelegate>
@property (nonatomic,strong)UIButton *UserImageBtn;
@property(nonatomic,strong )UITextField *accountTextField;
@property (nonatomic,strong)UITextField *passwordTextField;
@property (nonatomic,strong)UIButton *LoginBtn;
@property (nonatomic,strong)UIButton *FailedBtn;
@property (nonatomic,strong)UIButton *NewBtn;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
//分配初始化用户头像按钮。
self.UserImageBtn =[[UIButton alloc] initWithFrame:CGRectMake( (ScreenWidth-0.25*self.view.frame.size.width) / 2,80,
0.25*self.view.frame.size.width ,0.25*self.view.frame.size.width )];
//设置头像控件的图片
[self.UserImageBtn setBackgroundImage:[UIImage imageNamed:@"login_header@2x.png"] forState:(UIControlStateNormal)];
//圆形头像
_UserImageBtn.layer.cornerRadius =QQHeadHeight/2;
_UserImageBtn.layer.masksToBounds=YES;
//添加头像控件的改变头像事件
[_UserImageBtn addTarget:self action:@selector(setUserImageBtnAction:) forControlEvents:(UIControlEventTouchUpInside)];
//将头像控件添加到视图上
[self.view addSubview:self.UserImageBtn];
//=======================================================
//分配初始化账号和密码控件
self.accountTextField=[[UITextField alloc] initWithFrame:CGRectMake(AccountX, AccountY, AccountW, AccountH)];
self.passwordTextField=[[UITextField alloc] initWithFrame:CGRectMake(PasswordX, PasswordY, PasswordW, PasswordH)];
//设置账号和密码框控件的位置，提示字符，键盘类型
_accountTextField.textAlignment=NSTextAlignmentCenter;
_accountTextField.placeholder=@"QQ号码" ;
_accountTextField.keyboardType=UIKeyboardTypeNumberPad;
_passwordTextField.textAlignment=NSTextAlignmentCenter;
_passwordTextField.placeholder=@"QQ密码" ;
_passwordTextField.keyboardType=UIKeyboardTypeAlphabet;
//设置密码密文显示
_passwordTextField.secureTextEntry=YES;
//将账号和密码控件添加到视图
[self.view addSubview:self.accountTextField];
[self.view addSubview:self.passwordTextField];
//=======================================================
//分配初始化登陆控件
self.LoginBtn=[[UIButton alloc] initWithFrame:CGRectMake(LoginX, LoginY, LoginW, LoginH)];
//设置登陆控件的效果图片
[self.LoginBtn setBackgroundImage:[UIImage imageNamed:@"login_btn_blue_nor@2x.png"] forState:(UIControlStateNormal)];//正常
[self.LoginBtn setBackgroundImage:[UIImage imageNamed:@"login_btn_blue_press@2x.png"] forState:(UIControlStateHighlighted)];//高亮
//添加登陆控件的登陆事件
[self.LoginBtn addTarget:self action:@selector(LoginBtnClickListener) forControlEvents:UIControlEventTouchUpInside];
//将登陆控件添加到视图
[self.view addSubview:self.LoginBtn];
//=======================================================
//分配初始化-无法登陆控件
self.FailedBtn=[[UIButton alloc] initWithFrame:CGRectMake(FailedX , FailedY, FailedW, FailedH)];
//设置无法登陆控件的背景图片
[self.FailedBtn setBackgroundImage: [UIImage imageNamed:@"failed.png"] forState:(UIControlStateNormal)];
//将无法登陆控件添加到视图
[self.view addSubview:self.FailedBtn];
//=======================================================
//分配初始化新用户控件
self.NewBtn=[[UIButton alloc] initWithFrame:CGRectMake(NewX, NewY, NewW, NewH)];
//设置新用户控件的背景图片
[self.NewBtn setBackgroundImage:[UIImage imageNamed:@"new.png"] forState:(UIControlStateNormal)];//正常
//将新用户控件添加到视图
[self.view addSubview:self.NewBtn];
}
//=======================================================
//=======================================================
//=======================================================
//=======================================================
//实现改变QQ头像事件
-(void)setUserImageBtnAction:(UIButton *)UserImageBtn{
//分配初始化图片选择器控件
UIImagePickerController *imagePicker = [[UIImagePickerController alloc]init];
//设置图片来源为系统相册
imagePicker.sourceType=UIImagePickerControllerSourceTypePhotoLibrary;
//使用图片代理-查看协议-并实现“didFinishPickingImage”事件
imagePicker.delegate=self;
//使用模态窗口显示相册
[self presentViewController:imagePicker animated:YES completion:nil];
}
//=======================================================
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(nullable NSDictionary<NSString *,id> *)editingInfo{
//设置新头像
[_UserImageBtn setBackgroundImage:image forState:(UIControlStateNormal)];
//模态方式退出图像选择器
[picker dismissViewControllerAnimated:YES completion:nil];
}
//=======================================================
//实现登陆控件的登陆事件
- (void)LoginBtnClickListener{
if (self.accountTextField.text.length >0 && self.passwordTextField.text.length>0 ) {
//实例化提示窗
UIAlertController *alertController=[UIAlertController alertControllerWithTitle:@"温馨提示" message:@"登录中..." preferredStyle:(UIAlertControllerStyleAlert) ];
//添加按钮到提示窗
[alertController addAction:[UIAlertAction actionWithTitle:@"确定" style:(UIAlertActionStyleDefault) handler:nil]];
//显示提示框
[self presentViewController:alertController animated:YES completion:nil];
}else{
//实例化提示窗
UIAlertController *alertController=[UIAlertController alertControllerWithTitle:@"错误" message:@"用户密码不能为空" preferredStyle:(UIAlertControllerStyleAlert) ];
//添加按钮到提示窗
[alertController addAction:[UIAlertAction actionWithTitle:@"确定" style: (UIAlertActionStyleDefault) handler:nil]];
//显示提示框
[self presentViewController:alertController animated:YES completion:nil];
}
}
@end
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原文地址：http://www.cnblogs.com/mitnick/p/5392693.html
