登录界面
- 简单界面
屏幕快照 2016-05-06 下午8.40.47.png
- 1:导入头文件
#import "LoginViewController.h"
#import "EMSDK.h"
#import "RegisterViewController.h"
#import "UserInfoModel.h"
#import "AppDelegate.h"
#import "MainViewController.h"
- 2:声明需要构建页面的属性
@interface LoginViewController ()
@property (nonatomic, strong) UILabel *label_1;//登录
@property (nonatomic, strong) UILabel *label_2;//密码
@property (nonatomic, strong) UITextField *textfield_1;//用户名
@property (nonatomic, strong) UITextField *textfield_2;//密码
@property (nonatomic, strong) UIButton *button_1;
@property (nonatomic, strong) UIButton *button_2;
@property (nonatomic, strong) UIActivityIndicatorView *activityIndicatorView;//风火轮
@end
- 为了确保使用的登录界面是同一个界面,使用单例
+ (LoginViewController *)sharedLoginView{
static LoginViewController *loginVC = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
loginVC = [[LoginViewController alloc] init];
});
return loginVC;
}
- (void)viewDidLoad {
[super viewDidLoad];
{
[self.view addSubview:self.label_1];
[self.view addSubview:self.label_2];
[self.view addSubview:self.textfield_1];
[self.view addSubview:self.textfield_2];
[self.view addSubview:self.button_1];
[self.view addSubview:self.button_2];
}
self.navigationItem.title = @"登录";
}
#pragma mark-------button 的登陆方法的方法回调按钮
- (void)loginAction:(UIButton *)sender{
BOOL isNotSuccess = [self isSucces];
if (isNotSuccess) { //说明信息不能为空
[self.activityIndicatorView startAnimating];
/**
* 将登陆操作放到子线程中.比较耗时
*/
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
//登录
EMError *error = [[EMClient sharedClient] loginWithUsername:self.textfield_1.text password:self.textfield_2.text];
if (!error) {
//回到主线程
dispatch_async(dispatch_get_main_queue(), ^{
[self.activityIndicatorView stopAnimating];
[self.activityIndicatorView removeFromSuperview];
[self myAlerMessage:@"登陆成功"];
//需要将用户信息保存到本地
UserInfoModel *userInfoModel = [[UserInfoModel alloc] init];
userInfoModel.name = self.textfield_1.text;
userInfoModel.isLogin = YES;//要将 isLogin 改为 yes;
//自动登录
[[EMClient sharedClient].options setIsAutoLogin:YES];
//跳转到主界面
AppDelegate *delegate = (AppDelegate*)[UIApplication sharedApplication].delegate;
MainViewController *mainVC = [[MainViewController alloc] init];
delegate.window.rootViewController = mainVC;
//发送属性列表的广播
[[NSNotificationCenter defaultCenter] postNotificationName:@"refreshFriendList" object:nil];
});
NSLog(@"登陆成功");
}else{
//回到主线程
dispatch_async(dispatch_get_main_queue(), ^{
[self.activityIndicatorView stopAnimating];
[self.activityIndicatorView removeFromSuperview];
[self myAlerMessage:[NSString stringWithFormat:@"登录---失败:%d",error.code]];
});
}
});
}
}
#pragma mark-------label\textfield\button懒加载
- (UILabel *)label_1{
if (!_label_1) {
_label_1 = [[UILabel alloc] initWithFrame:CGRectMake(50, 200, 100, 40)];
_label_1.text = @"用户";
_label_1.backgroundColor = [UIColor cyanColor];
}
return _label_1;
}
- (UILabel *)label_2{
if (!_label_2) {
_label_2 = [[UILabel alloc] initWithFrame:CGRectMake(50, 260, 100, 40)];
_label_2.text = @"密码";
_label_2.backgroundColor = [UIColor cyanColor];
}
return _label_2;
}
- (UITextField *)textfield_1{
if (!_textfield_1) {
_textfield_1 = [[UITextField alloc] initWithFrame:CGRectMake(170, 200, 150, 40)];
_textfield_1.placeholder = @"请输入用户名";
_textfield_1.backgroundColor = [UIColor cyanColor];
}
return _textfield_1;
}
- (UITextField *)textfield_2{
if (!_textfield_2) {
_textfield_2 = [[UITextField alloc] initWithFrame:CGRectMake(170, 260, 150, 40)];
_textfield_2.placeholder = @"请输入密码";
_textfield_2.backgroundColor = [UIColor cyanColor];
}
return _textfield_2;
}
- (UIButton *)button_1{
if (!_button_1) {
_button_1 = [UIButton buttonWithType:UIButtonTypeSystem];
[_button_1 setFrame:CGRectMake(75,330, 100, 50)];
[_button_1 setTitle:@"登录" forState: UIControlStateNormal];
[_button_1 addTarget:self action:@selector(loginAction:) forControlEvents:UIControlEventTouchUpInside];
}
return _button_1;
}
- (UIButton *)button_2{
if (!_button_2) {
_button_2 = [UIButton buttonWithType:UIButtonTypeSystem];
[_button_2 setFrame:CGRectMake(150,330, 100, 50)];
[_button_2 setTitle:@"注册" forState: UIControlStateNormal];
[_button_2 addTarget:self action:@selector(RegisterAction:) forControlEvents:UIControlEventTouchUpInside];
}
return _button_2;
}
- RegisterAction:方法的回调(注册界面的)
- (void)RegisterAction:(UIButton *)button{
//进入注册页面
RegisterViewController *registerVC = [[RegisterViewController alloc] init];
[self.navigationController pushViewController:registerVC animated:YES];
}
#pragma mark-------在注册过程中,让用户感知到正在注册
- (UIActivityIndicatorView *)activityIndicatorView{
if (!_activityIndicatorView) {
_activityIndicatorView = [[UIActivityIndicatorView alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
_activityIndicatorView.center = self.view.center;
_activityIndicatorView.activityIndicatorViewStyle = UIActivityIndicatorViewStyleGray;
_activityIndicatorView.color = [UIColor redColor];
//直接添加在页面上的话.
[self.view addSubview:_activityIndicatorView];
}
return _activityIndicatorView;
}
#pragma mark------提示框;
- (void)myAlerMessage:(NSString*)msg{
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"友情提示" message: msg preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction *sureAction = [UIAlertAction actionWithTitle:@"确定" style: UIAlertActionStyleCancel handler:nil];
[alertController addAction:sureAction];
[self presentViewController:alertController animated:YES completion:nil];
}
#pragma mark------非空判断
- (BOOL)isSucces{
if (self.textfield_1.text.length == 0) {
[self myAlerMessage:@"用户名不能为空"];
return NO;
}
if (self.textfield_2.text.length == 0) {
[self myAlerMessage:@"密码不能为空"];
return NO;
}
return YES;
}