Question

为了更容易阅读代码，我决定将AlertView创建为新对象。我创建了类AlertViews作为NSObject的子类。我创建了2个UIAlertView - 一个是单文本字段，另一个是普通UIAlertView。为了测试它，我想在UIAlertView中输入文本，单击OK并查看NSLog。

AlertViews.h

@interface AlertViews: NSobject 
{ 
   UIAlertView *addSomethingAlertView;
   UIAlertView * showSomethingAV; 
}


@property (nonatomic, retain) UIAlertView *addSomethingAlertView;
@property (nonatomic, retain) UIAlertView *showSomethingAV;

-(void)InitializeAddSomethingAlertView;
-(void)InitializeShowSomethingAV;

AlertViews.m

@implementation 

@synthesize addSomethingAlertView = _addSomethingAlertView;
@synthesize showSomethingAV = _showSomethingAV;

-(void)initializeAddSomethingAlertView {

    addSomethingAlertView = [[UIAlertView alloc] initWithTitle:@"Something" 
    message:@"something" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitle:@"OK", nil];

    addsomethingAlertViewStyle = UIAlertViewStylePlainTextInput;
    [[addSomethingAlertView textFieldAtIndex:0] setDelegate: self];
    [[addSomethingAlertView textFieldAtIndex:0] setKeyboardType: UIKeyboardTypeDecimalPad];
    [[addSomethingAlertView textFieldAtIndex:0] becomeFirstResponder];

    [addSomethingAlertView show]; }

-(void)InitializeShowSomethingAV {

    showSomethingAV = [[UIAlertView alloc] initWithTitle:@"show" message:@"show"
    delegate:self cancelButtonTitle:@"Cancel" otherButtonTitle:@"show", nil];

    [showSomethingAV show];


@end

ViewController.h

#import"AlertViews.h"

@interface ViewController: UIViewController <UIAlertViewDelegate> { 

 AlertViews *newAlert;
 AlertViews *showAlert; 
}

@property (nonatomic, retain) AlertViews *newAlert;
@property (nonatomic, retain) AlertViews *newAlert;

-(IBAction)adding:(id)sender;
-(IBAction)showing:(id)sender;

ViewController.m

@implementation
@synthesize newAlert = _newAlert;
@synthesize showAlert = _showAlert;

-(IBAction)adding:(id)sender {

    [self.newAlert = [[AlertViews alloc] init];
    [self.newAlert initializeAddSomethingAlertView];
}

-(IBAction)showing:(id)sender {

    [self.showAlert = [[AlertViews alloc] init];
    [self.showAlert initializeshowSomethingAV];

@end

我尝试在ViewController.m中实现此代码

-(void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex 
{
    if (addsomethingAlertView) {if (buttonIndex == 1) { NSLog(@"adding"); }
    if (showSomethingAV) {if (buttonIndex == 1) {NSLog(@"showing"); }
}

但是，我没有得到任何LOG。

另外，如何使用在AlertView文本字段中输入的文本？

谢谢！

Answer 1

请在执行以下内容后检查您是否能够正常工作

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
    if (buttonIndex == 0){
      //cancel button clicked. 
    }
    else{
      //For getting the text entered in alertview text field, you need to do like this
      UITextField* yourTxt= [alertView textFieldAtIndex:0];
      NSString* txtContent= yourTxt.text;

    }
}

希望有所帮助......

Answer 2

UPOATE - 我已经想通了。

AlertViews.h

#import"ViewController.h"


@interface AlertViews: NSobject 
{ 
UIAlertView *addSomethingAlertView;
UITextField *addSomethingTF;
}


@property (nonatomic, retain) UIAlertView *addSomethingAlertView;
 @property (nonatomic, strong) UITextField *addSomethingTF;

-(void)InitializeAddSomethingAlertView;

AlertViews.m

@implementation 

@synthesize addSomethingAlertView = _addSomethingAlertView;
@synthesize showSomethingAV = _showSomethingAV;
@synthesize addSomething;


-(void)initializeAddSomethingAlertView {

addSomethingAlertView = [[UIAlertView alloc] initWithTitle:@"Something" 
message:@"something" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitle:@"OK", nil];

addsomethingAlertViewStyle = UIAlertViewStylePlainTextInput;
[[addSomethingAlertView textFieldAtIndex:0] setDelegate: self];
[[addSomethingAlertView textFieldAtIndex:0] setKeyboardType: UIKeyboardTypeDecimalPad];
[[addSomethingAlertView textFieldAtIndex:0] becomeFirstResponder];

[addSomethingAlertView show]; }

ViewController.h

#import"AlertViews.h"

@interface ViewController: UIViewController <UIAlertViewDelegate> { 

 AlertViews *newAlert;
 UILabel *testLabel;
}

@property (nonatomic, retain) AlertViews *newAlert;
@property (nonatomic, strong) UILabel *testLabel;
@property (nonatomic, strong) NSString *passString;

-(IBAction)adding:(id)sender;

ViewController.m

@implementation
@synthesize newAlert = _newAlert;
@synthesize showAlert = _showAlert;
@synthesize testLabel;
@synthesize passString;

-(IBAction)adding:(id)sender {

    [self.newAlert = [[AlertViews alloc] init];
    [self.newAlert initializeAddSomethingAlertView];
}

 -(IBAction)showing:(id)sender {

  [self.showAlert = [[AlertViews alloc] init];
    [self.showAlert initializeshowSomethingAV];

 @end

在AlertViews.m中的

我添加了以下代码：

 -(void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:
 (NSInteger)buttonIndex { if(addSomethingAlertView) { if(buttonIndex == 1) NSLog(@"testing success");


addSomething = [addSomethingAlertView textFieldAtIndex:0];
addSomething.text =[addSomethingAlertView textFieldAtIndex:0].text;




ViewController * vc = [[MainScreenViewController alloc] init];
vc.passString = addSomething.text;


NSLog(@"%@", grab);

}

然后在ViewController.m中添加：

-(void)viewWillAppear:(BOOL)animated {

testLabel.text = passString; }

AlertView在ViewController外部定义

2 个答案: