我正在开发的应用程序允许用户使用不同的按钮阅读文本和撰写文本。我现在的问题是，在阅读文本的屏幕上，如果用户在屏幕上用于编写文本的 UITextView 框内点击，则会出现键盘。这种情况下的 UITextView 是self.textView；我已经将键盘通知和keyboardWillShow方法放在if(self.textView)语句中，然后确保在阅读文本方法的开头调用[self.textView removeFromSuperView]和设置，但是当您点击设置的空间时键盘仍然出现（顺便说一句，以编程方式，不使用 IB）。self.textView = nil;self.textView
我究竟做错了什么？
编辑： 谢谢你们的回答，伙计们，但那个该死的键盘仍然会回来，就像歌曲中的猫一样......这是我的代码。如果可以，请原谅它的长度；如果我做了一些不可靠的事情，我不知道它在哪里，所以我不知道要省略什么。
这是viewDidLoad.
-(void)viewDidLoad {
[super viewDidLoad];
self.textView.editable=NO;
self.textView.userInteractionEnabled = NO;
UISwipeGestureRecognizer *swipeRight = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(previousHaiku)];
swipeRight.numberOfTouchesRequired = 1;
swipeRight.direction = UISwipeGestureRecognizerDirectionRight;
[self.view addGestureRecognizer:swipeRight];
UISwipeGestureRecognizer *swipeLeft = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(nextHaiku)];
swipeLeft.numberOfTouchesRequired = 1;
swipeLeft.direction = UISwipeGestureRecognizerDirectionLeft;
[self.view addGestureRecognizer:swipeLeft];
NSError *error;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *path = [documentsDirectory stringByAppendingPathComponent:@"gayHaiku.plist"];
NSFileManager *fileManager = [NSFileManager defaultManager];
if (![fileManager fileExistsAtPath: path])
{
NSString *bundle = [[NSBundle mainBundle] pathForResource:@"gayHaiku" ofType:@"plist"];
[fileManager copyItemAtPath:bundle toPath: path error:&error];
}
self.gayHaiku = [[NSMutableArray alloc] initWithContentsOfFile: path];
[self nextHaiku];
}
这是nextHaiku最后一个调用的方法viewDidLoad——这是读取方法。
-(void)nextHaiku
{
[self.view.layer removeAllAnimations];
[self.bar removeFromSuperview];
self.textToSave=@"";
self.haiku_text.text=@"";
[self.view viewWithTag:1].hidden = NO;
[self.view viewWithTag:3].hidden = NO;
int indexOfHaiku;
NSMutableArray *arrayOfHaikuSeen;
NSString *cat;
if (!self.selectedCategory) cat = @"Derfner";
else cat = self.selectedCategory;
NSArray *filteredArray;
if (cat==@"all")
{
filteredArray = self.gayHaiku;
indexOfHaiku = self.indxAll;
arrayOfHaikuSeen = self.theseAreDoneAll;
}
else
{
indexOfHaiku = (cat==@"user")?self.indxU:self.indxD;
arrayOfHaikuSeen = (cat==@"user")?self.theseAreDoneU:self.theseAreDoneD;
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"category == %@", cat];
filteredArray = [self.gayHaiku filteredArrayUsingPredicate:predicate];
}
int array_tot = [filteredArray count];
int sortingHat;
NSString *txt;
if (array_tot > 0)
{
if (indexOfHaiku == arrayOfHaikuSeen.count)
{
while (true)
{
sortingHat = (arc4random() % array_tot);
if (![arrayOfHaikuSeen containsObject:[filteredArray objectAtIndex:sortingHat]]) break;
}
txt = [[filteredArray objectAtIndex:sortingHat] valueForKey:@"quote"];
if (!arrayOfHaikuSeen || arrayOfHaikuSeen.count==array_tot)
{
arrayOfHaikuSeen = [[NSMutableArray alloc] init];
}
[arrayOfHaikuSeen addObject:[filteredArray objectAtIndex:sortingHat]];
indexOfHaiku = arrayOfHaikuSeen.count;
if (arrayOfHaikuSeen.count==filteredArray.count)
{
[arrayOfHaikuSeen removeAllObjects];
indexOfHaiku=0;
}
}
else
{
txt = [[arrayOfHaikuSeen objectAtIndex:indexOfHaiku] valueForKey:@"quote"];
indexOfHaiku += 1;
}
}
//Need to test to make sure it starts over once all 110 haiku have been seen.
CGSize dimensions = CGSizeMake(320, 400);
CGSize xySize = [txt sizeWithFont:[UIFont fontWithName:@"Helvetica" size:14.0] constrainedToSize:dimensions lineBreakMode:0];
self.haiku_text = [[UITextView alloc] initWithFrame:CGRectMake((320/2)-(xySize.width/2),200,320,200)];
self.haiku_text.font = [UIFont fontWithName:@"Helvetica Neue" size:14];
self.haiku_text.backgroundColor = [UIColor clearColor];
self.haiku_text.text=txt;
CATransition *transition = [CATransition animation];
transition.duration = 0.25;
transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
transition.type = kCATransitionPush;
transition.subtype =kCATransitionFromRight;
transition.delegate = self;
[self.view.layer addAnimation:transition forKey:nil];
[self.view addSubview:self.haiku_text];
if (cat==@"user")
{
self.theseAreDoneU = arrayOfHaikuSeen;
self.indxU = indexOfHaiku;
}
else if (cat==@"all")
{
self.theseAreDoneAll = arrayOfHaikuSeen;
self.indxAll = indexOfHaiku;
}
else
{
self.theseAreDoneD = arrayOfHaikuSeen;
self.indxD = indexOfHaiku;
}
}
这是写作方法。
-(void)userWritesHaiku
//Set up the screen.
[self clearScreen];
self.textView = [[UITextView alloc] initWithFrame:CGRectMake(20, 60, 280, 150)];
self.textView.delegate = self;
self.textView.returnKeyType = UIReturnKeyDefault;
self.textView.keyboardType = UIKeyboardTypeDefault;
self.textView.font = [UIFont fontWithName:@"Helvetica Neue" size:14];
self.textView.scrollEnabled = YES;
self.textView.autoresizingMask = UIViewAutoresizingFlexibleHeight;
self.textView.userInteractionEnabled = YES;
self.textView.editable=YES;
self.textView.backgroundColor = [UIColor colorWithRed:217 green:147 blue:182 alpha:.5];
[self.view addSubview: self.textView];
[self loadNavBar:@"Compose"];
[self addLeftButton:@"Instructions" callingMethod:@"haikuInstructions"];
//If you've added text before calling haikuInstructions, when you return from haikuInstructions the textView window with the different background color AND the keyboard.
[self addRightButton:@"Done" callingMethod:@"userFinishedWritingHaiku"];
self.titulus.hidesBackButton=YES;
[self seeNavBar];
//Create and add the space for user to write.
[self createSpaceToWrite];
if (self.textToSave!=@"")
{
self.textView.text = self.textToSave;
}
[self.view addSubview:self.textView];
[self.textView becomeFirstResponder];
//Keyboard notifications.
if (self.textView)
{
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];
}
}