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[self presentViewController:vc animated:YES completion:^{ }] NSMutableArray* array = [self.navigationController.viewControllers mutableCopy]; |
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push本来就不销毁啊，用 present 切换才是销毁的
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但push完我需要销毁，原来的界面用不上了，present也不销毁，但我也要销毁 |
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假设你有两个VC，一个是VC1，一个是VC2，想进入VC2的时候把VC1释放掉是可以的（例如一些 app 的登录页面），这种情况下，在VC1的时候不要直接push VC2，而是通过navigationController的setViewControllers去手动管理VC栈，如： NSMutableArray *arr = self.navigationController.viewControllers.mutableCopy /* arr remove VC1 */ /* arr add VC2 */ [self.navigationController setViewControllers:arr animated:YES]; |
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我这样操作了，navi里没有了，但是push后还是没执行dealloc方法，是其他地方的问题吗 |
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你的 VC1 有内存泄漏，检查下 |
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好的，谢谢，我再检查下
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- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
self.title = @"登录";
[self createUI];
}
-(void)createUI{
self.userNameTF = [[UITextField alloc]initWithFrame:CGRectMake(44, 100, ScreenWidth-44*2, 40)];
self.userNameTF.backgroundColor = [UIColor whiteColor];
self.userNameTF.placeholder = @"用户名";
self.userNameTF.borderStyle = UITextBorderStyleBezel;
self.userNameTF.clearButtonMode = UITextFieldViewModeWhileEditing;
self.userNameTF.delegate = self;
[self.view addSubview:self.userNameTF];
self.passwordTF = [[UITextField alloc]initWithFrame:CGRectMake(_userNameTF.left, _userNameTF.bottom+20, _userNameTF.width, _userNameTF.height)];
self.passwordTF.backgroundColor = [UIColor whiteColor];
self.passwordTF.placeholder = @"密码";
self.passwordTF.borderStyle = UITextBorderStyleBezel;
self.passwordTF.clearButtonMode = UITextFieldViewModeWhileEditing;
self.passwordTF.secureTextEntry = YES;
self.passwordTF.delegate = self;
[self.view addSubview:self.passwordTF];
UIButton* loginButton = [[UIButton alloc]initWithFrame:CGRectMake(ScreenWidth/2 - 50, _passwordTF.bottom+20, 100, 44)];
loginButton.backgroundColor = [CustomColor blue];
loginButton.titleLabel.font = [UIFont boldSystemFontOfSize:18];
[loginButton setTitle:@"登 录" forState:UIControlStateNormal];
[loginButton addTarget:self action:@selector(login) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:loginButton];
}
//登录
-(void)login{
if ([self.userNameTF.text isEqualToString:@""]){
[super showHUD:@"请输入用户名!"];
return;
}
else if ([self.passwordTF.text isEqualToString:@""]){
[super showHUD:@"请输入密码!"];
return;
}
[super showHUD:@"登录中..." isDim:NO];
[GUtils loginUserByUserName:self.userNameTF.text andPassword:self.passwordTF.text completion:^(id obj) {
dispatch_async(dispatch_get_main_queue(), ^{
[super removeHUD];
if ([obj isEqualToString:@"1"]) {
//登录成功
HomeViewController* vc = [[HomeViewController alloc]init];
NSMutableArray *array = [self.navigationController.viewControllers mutableCopy];
[array removeObject:self];
[array addObject:vc];
[self.navigationController setViewControllers:array animated:YES];
}
else if ([obj isEqualToString:@"-2"]) {
[super showHUD:@"账号不存在!"];
}
else if ([obj isEqualToString:@"-1"]) {
[super showHUD:@"密码错误!"];
}
else if ([obj isEqualToString:@"null"]) {
[super showHUD:@"系统繁忙,请稍候重试!"];
}
});
}];
}
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
[self.userNameTF resignFirstResponder];
[self.passwordTF resignFirstResponder];
}
#pragma mark -TextFieldDelegate
- (BOOL)textFieldShouldReturn:(UITextField *)textField{
[textField resignFirstResponder];
return YES;
}
这是我登录界面的代码 |
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- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
self.view.backgroundColor = [CustomColor lightGray];
if (self.navigationController.viewControllers.count > 1 ) {
UIButton *button = [[UIButton alloc]init];
// [button setImage:[UIImage imageNamed:@"return.png"] forState:UIControlStateNormal];
// [button setImage:[UIImage imageNamed:@"return_on.png"] forState:UIControlStateHighlighted];
[button setTitle:@"后退" forState:UIControlStateNormal];
button.backgroundColor = [CustomColor deepGray];
button.frame = CGRectMake(0, 0, 44, 44);
[button addTarget:self action:@selector(backAction) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *backItem = [[UIBarButtonItem alloc] initWithCustomView:button];
self.navigationItem.leftBarButtonItem = backItem;
}
}
-(void)viewWillAppear:(BOOL)animated{
[super viewWillAppear:animated];
}
-(void)backAction{
[self.navigationController popViewControllerAnimated:YES];
}
//设置导航栏上的标题
- (void)setTitle:(NSString *)title {
[super setTitle:title];
UILabel *titleLabel = [[UILabel alloc] initWithFrame:CGRectZero];
titleLabel.textColor = [UIColor whiteColor];
titleLabel.font = [UIFont boldSystemFontOfSize:18.0f];
titleLabel.backgroundColor = [UIColor clearColor];
titleLabel.text = title;
[titleLabel sizeToFit];
self.navigationItem.titleView = titleLabel;
}
#pragma mark -HUD
-(void)showHUD:(NSString*)title{
//如果之前有，先移除
if (self.hud) {
[self.hud removeFromSuperview];
}
self.hud = [MBProgressHUD showHUDAddedTo:self.view animated:YES];
// self.hud.customView=[[UIImageView alloc]initWithImage:[UIImage imageNamed:@"37x-Checkmark.png"]];
self.hud.customView = [[UIView alloc]init];
self.hud.mode=MBProgressHUDModeCustomView;
self.hud.labelText=title;
[self.hud hide:YES afterDelay:1];
}
-(void)showHUD:(NSString*)title withDelay:(CGFloat)time{
//如果之前有，先移除
if (self.hud) {
[self.hud removeFromSuperview];
}
self.hud = [MBProgressHUD showHUDAddedTo:self.view animated:YES];
// self.hud.customView=[[UIImageView alloc]initWithImage:[UIImage imageNamed:@"37x-Checkmark.png"]];
self.hud.customView = [[UIView alloc]init];
self.hud.mode = MBProgressHUDModeCustomView;
self.hud.labelText = title;
[self.hud hide:YES afterDelay:time];
}
-(void)showHUD:(NSString *)title isDim:(BOOL)isDim {
//如果之前有，先移除
if (self.hud) {
[self.hud removeFromSuperview];
}
self.hud = [MBProgressHUD showHUDAddedTo:self.view animated:YES];
self.hud.dimBackground = isDim;
self.hud.labelText = title;
}
-(void)removeHUD{
if (self.hud) {
[self.hud removeFromSuperview];
}
}
-(void)dealloc{
NSLog(@"%@",[NSString stringWithFormat:@"%@销毁",[self class]]);
}
这是登录界面继承的类的代码 ，不知道哪里内存泄露了，界面不销毁，push出去然后pop出来的部分界面也不销毁，是这个类的问题吗 |
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这样看似乎没有， 你通过注释代码来做点测试吧，比如把 login 里的方法都注释掉，只调用登录成功后的那段：
//登录成功 HomeViewController* vc = [[HomeViewController alloc]init]; NSMutableArray *array = [self.navigationController.viewControllers mutableCopy]; [array removeObject:self]; [array addObject:vc]; [self.navigationController setViewControllers:array animated:YES]; 看有没有被释放，如果这里没有的话，在其他方法里再试试 |
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注释掉可以了，请求出了问题,我再研究下，谢谢 |
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祝早日解决 |
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