Iphone 子类化UIToolbar时崩溃
我已经对UIToolbar进行了子类化,以便更容易地实现safari下一步、上一步、完成某种事情。 当我直接添加它时(即不是子类化)一切都很好,但现在我这样做了,每次我用鼠标点击其中一个按钮时,它都会崩溃Iphone 子类化UIToolbar时崩溃,iphone,objective-c,uitoolbar,Iphone,Objective C,Uitoolbar,我已经对UIToolbar进行了子类化,以便更容易地实现safari下一步、上一步、完成某种事情。 当我直接添加它时(即不是子类化)一切都很好,但现在我这样做了,每次我用鼠标点击其中一个按钮时,它都会崩溃 -[keyboardToolBar hideKeyboard:]:无法识别的选择器发送到实例 这是我第一次尝试子类化一些东西,所以我不确定我是否做了一些错误的方式 子类的代码 @interface keyboardToolBar : UIToolbar { UIToolbar *keyboar
-[keyboardToolBar hideKeyboard:]:无法识别的选择器发送到实例
这是我第一次尝试子类化一些东西,所以我不确定我是否做了一些错误的方式
子类的代码
@interface keyboardToolBar : UIToolbar {
UIToolbar *keyboard;
UIBarItem *previous;
UIBarItem *next;
UIBarItem *done;
}
@property (nonatomic, retain) UIToolbar *keyboard;
@property (nonatomic, retain) UIBarItem *previous;
@property (nonatomic, retain) UIBarItem *next;
@property (nonatomic, retain) UIBarItem *done;
-(void)previousField;
-(void)nextField;
-(void)hideKeyboard;
@end
#import "keyboardToolBar.h"
@implementation keyboardToolBar
@synthesize keyboard, previous, done, next;
-(UIToolbar*)initWithFrame:(CGRect)frame{
//Create a new toolbar
keyboard = [[UIToolbar alloc]initWithFrame:frame];
//Create all the buttons and point them to methods
UIBarButtonItem *previousButton = [[UIBarButtonItem alloc] initWithTitle:@"Previous"
style:UIBarButtonItemStyleBordered
target:self
action:@selector(previousField:)];
UIBarButtonItem *nextButton = [[UIBarButtonItem alloc] initWithTitle:@"Next"
style:UIBarButtonItemStyleBordered
target:self
action:@selector(nextField:)];
UIBarButtonItem *filler = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace
target:nil
action:nil];
UIBarButtonItem *doneButton = [[UIBarButtonItem alloc] initWithTitle:@"Done"
style:UIBarButtonItemStyleBordered
target:self
action:@selector(hideKeyboard:)];
//Set the width of both of the buttons to make it look pritty
previousButton.width = 70.0f;
nextButton.width = 70.0f;
self.previous = previousButton;
self.next = nextButton;
self.done = doneButton;
//Add the buttons to the toolbar
[keyboard setItems:[[[NSArray alloc] initWithObjects:self.previous, self.next, filler, self.done, nil] autorelease]];
//Release the buttons
[previous release];
[next release];
[filler release];
[done release];
//return the shiny new toolbar
return keyboard;
}
-(void)previousField{
}
-(void)nextField{
}
-(void)hideKeyboard{
NSLog(@"hello");
}
@end
并使用UIToolbar*keyboard=[[keyboardToolBar alloc]initWithFrame:CGRectMake(0,0,self.view.bounds.size.width,50)]调用代码>
我已经尝试了我能想到的一切,但仍然得到同样的错误。我相信我只是没有保留一些东西,把按钮指向错误的地方,但任何帮助都将不胜感激
谢谢
Darc您(或您正在做的事情)正在调用隐藏板:
(注意冒号,表示该方法有一个参数)。但是,您实现的hideKeyboard
方法不接受任何参数
最有可能的是,hideKeyboard
应更改为:
- (void)hideKeyboard:(id)sender {
NSLog(@"hello");
}
另一方面,通常的类名样式是大写的,因此您的子类应该是KeyboardToolBar
(我还建议保留与Apple类相同的驼峰大小写,因此KeyboardToolBar
最好)。这里的问题是,您的按钮正在调用接受输入的函数,但您的函数不接受输入:
UIBarButtonItem *doneButton = [[UIBarButtonItem alloc] initWithTitle:@"Done"
style:UIBarButtonItemStyleBordered
target:self
action:@selector(hideKeyboard:)];
这意味着必须有一个方法hideKeyboard:(id)sender
。但是你有
-(void)hideKeyboard{
NSLog(@"hello");
}
要么向函数添加输入,要么从选择器调用中删除:
。您有效地将其作为类方法编写,由于内存管理等问题,这里有一个更好的版本
-(UIToolbar*)initWithFrame:(CGRect)frame{
//创建一个新的工具栏
if ((self = [super initWithFrame:frame]))
//Create all the buttons and point them to methods
previous = [[UIBarButtonItem alloc] initWithTitle:@"Previous" style:UIBarButtonItemStyleBordered target:self action:@selector(previousField:)];
next = [[UIBarButtonItem alloc] initWithTitle:@"Next" style:UIBarButtonItemStyleBordered target:self action:@selector(nextField:)];
UIBarButtonItem *filler = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
done = [[UIBarButtonItem alloc] initWithTitle:@"Done" style:UIBarButtonItemStyleBordered target:self action:@selector(hideKeyboard:)];
//Set the width of both of the buttons to make it look pritty
previous.width = 70.0f;
next.width = 70.0f;
//Add the buttons to the toolbar
[keyboard setItems:[[[NSArray alloc] initWithObjects:previous, next, filler, done, nil] autorelease]];
//Release the buttons
[previous release];
[next release];
[filler release];
[done release];
//return the shiny new toolbar
return self;
}
同时将您的方法修改为
@选择器(someAction)
匹配-(void)someAction;
或@选择器(someAction:)
匹配-(void)someAction:(id)发送方;
也没有理由保留对UIToolBar*键盘的引用,因为您希望它是自己的。
实际上,可能根本没有理由保留对按钮的引用,除非您以后需要更改它们的标题或操作/目标对。Dam it,new it’s简单。谢谢:原始代码返回的是UIToolbar,而不是键盘工具栏(几乎肯定是错的)并泄漏正在接收EFENT的键盘工具栏!