Question

这真是太简单了！我错过了一些东西，我试图解决它已经筋疲力尽了。希望有人能提供帮助。

CharacterView.m中的Button可以正常工作，但是嵌入在CharacterMale.m中的按钮却没有。我没有使用IB一切都是按步骤完成的。什么会导致一个按钮工作而其他按钮不起作用？

/////////////////////////////////////////////////////////////////////////////////
 CharacterController.m
/////////////////////////////////////////////////////////////////////////////////
#import "CharacterController.h"
#import "CharacterView.h"

@implementation CharacterController

- (id)init {
    NSLog(@"CharacterController init");
    self = [ super init ];
    if (self != nil) {
    }
    return self;
}

- (void)loadView {
    [ super loadView ];
    characterView = [ [ CharacterView alloc ] init];
    self.view = characterView;
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
}


- (void)dealloc {
    [super dealloc];
}

@end

/////////////////////////////////////////////////////////////////////////////////
 CharacterView.m
/////////////////////////////////////////////////////////////////////////////////

#import "CharacterView.h"
#import "CharacterMale.h"

@implementation CharacterView

- (id)initWithFrame:(CGRect)frame {
    if (self = [super initWithFrame:frame]) {
        characterMale = [ [ CharacterMale alloc ] init];
        [self addSubview: characterMale];

        UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
        button.frame = CGRectMake(0, 200, 200, 100);
        [button setImage:[UIImage imageNamed:@"btnCharSelect.png"] forState:UIControlStateNormal];
        [button addTarget:self action:@selector(ApplyImage:) forControlEvents:UIControlEventTouchUpInside];
        [ self addSubview: button ];
    }
    return self;
}

- (void)drawRect:(CGRect)rect {
}

-(void)ApplyImage:(id)sender
{
    NSLog(@"CharacterView button works");
}

- (void)dealloc {
    [super dealloc];
}

@end

/////////////////////////////////////////////////////////////////////////////////
 CharacterMale.m
/////////////////////////////////////////////////////////////////////////////////

#import "CharacterMale.h"
#import "CharacterController.h"

@implementation CharacterMale

- (id)init {
    self = [ super init];
    if (self != nil) {
        UIImage *image = [UIImage imageNamed:@"charMale.png"];
        imageView = [[ UIImageView alloc] initWithImage:image];
        [image release];
        [ self addSubview: imageView ];

        UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
        button.frame = CGRectMake(0, 0, 200, 100);
        [button setImage:[UIImage imageNamed:@"btnCharSelect.png"] forState:UIControlStateNormal];
        [button addTarget:self action:@selector(ApplyImage:) forControlEvents:UIControlEventTouchUpInside];
        [ self addSubview: button ];

    }
    return self;
}

-(void)ApplyImage:(id)sender
{
    NSLog(@"CharacterMal button works");
}

- (void)dealloc {
    [super dealloc];
}

@end

Answer 1

最后!!!!!!

我必须使用initWithFrame初始化所有视图并传入有效的帧rects。 Init应与控制器和initWithFrame一起使用，传递UIViews !!!!

characterView = [ [ CharacterView alloc ] initWithFrame:CGRectMake(0, 0, 480, 320)]; 
then 
characterMale = [ [ CharacterMale alloc ] initWithFrame:frame];

Answer 2

另一件需要考虑的事情是UIButton个已添加UIImageView的子视图根本不起作用。您需要创建一个UIView，您可以将图像视图和按钮添加到。

这可能是因为图像视图默认关闭了交互，但我没有检查过这个。

Answer 3

新视图是否接受用户互动？换句话说，是否在视图“Characters”上启用了userInteractionEnabled？

Answer 4

在使用CGRectZero框架初始化UIView期间尝试添加按钮时，我遇到了类似的问题：

@implementation SomeView
...
- (id)initWithTitleImage:(UIImage *) newTitleImage {
  // BROKEN: frame with CGRectZero.
  self = [super initWithFrame:CGRectZero];
  if (self) {
    UIButton *someButton = ...;
    [self addSubview someButton];
  }
}

一旦我将框架更改为正确的矩形，按钮就会起作用：

@implementation SomeView
...
- (id)initWithTitleImage:(UIImage *) newTitleImage {
  // WORKING: frame with proper CGRect.
  self = [super initWithFrame:CGRectMake(0, 0, 480, 320)];
  if (self) {
    UIButton *someButton = ...;
    [self addSubview someButton];
  }
}

Answer 5

我很幸运使用UIControlEventTouchDown代替热门UIControlEventTouchUpInside在drawRect中创建的UIButton的选择器。

Answer 6

对我来说问题是因为，按钮框架的原点比父框架大。

Iphone UIButton不能在嵌套的UIViews中工作

6 个答案: