在UIView的子類中添加一個按鈕和動作

Question

我有一個類CustomView（UIView的子類沒有xib文件），我在其中創建一些標籤和按鈕。我想在我的另一個UIViewController中使用這個類來添加這些標籤和按鈕。我能夠使用自定義視圖添加標籤和按鈕到我的viewController，但如果我添加一些操作或事件到按鈕（這是在自定義視圖中），它不起作用。請建議我應該如何爲按鈕添加操作。

//ViewController code 

CustomView *slider=[[CustomView alloc]init]; 
[self.view addSubview:slider]; 

//CustomView code 


toggleButton = [UIButton buttonWithType:UIButtonTypeCustom]; 
[toggleButton setTitle:@"" forState:UIControlStateNormal]; 
toggleButton.userInteractionEnabled=YES; 

// add drag listener 
[toggleButton addTarget:self action:@selector(wasDragged:withEvent:) 
     forControlEvents:UIControlEventTouchDragInside]; 



// center and size 
toggleButton.frame = CGRectMake(frame.origin.x, frame.origin.y, width, frame.size.height); 

toggleButton.backgroundColor=[UIColor colorWithRed:0.1 green:0.1 blue:0.0 alpha:0.1]; 
[toggleButton.layer setBorderWidth:4.0]; 
[toggleButton.layer setBorderColor:[[UIColor lightGrayColor] CGColor]]; 
toggleButton.layer.cornerRadius=4.0; 
[toggleButton setTitleColor:[UIColor colorWithRed:0.3 green:0.1 blue:0.4 alpha:1.0] forState:UIControlStateNormal]; 

// add it, centered 
[self addSubview:toggleButton]; 


    - (void)wasDragged:(UIButton *)button withEvent:(UIEvent *)event 
    { 
    NSLog(@"inside drag"); 
    } 

Answer 1

與以下替換代碼：

CustomView.h：

#import <UIKit/UIKit.h> 
#import <QuartzCore/QuartzCore.h> 

@interface CustomView : UIView 

@property (nonatomic, strong) UIButton *toggleButton; 

@end 

CustomView.m：

#import "CustomView.h" 

@implementation CustomView 

@synthesize toggleButton; 

- (id)initWithFrame:(CGRect)frame 
{ 
     self = [super initWithFrame:frame]; 
     if (self) { 
      // Initialization code 
      toggleButton = [UIButton buttonWithType:UIButtonTypeCustom]; 
      [toggleButton setTitle:@"" forState:UIControlStateNormal]; 
      toggleButton.userInteractionEnabled=YES; 

      // add drag listener 
      [toggleButton addTarget:self action:@selector(wasDragged:withEvent:) 
         forControlEvents:UIControlEventTouchDragInside]; 

      // center and size 
      toggleButton.frame = CGRectMake(frame.origin.x, frame.origin.y, width, frame.size.height); 

      toggleButton.backgroundColor=[UIColor colorWithRed:0.1 green:0.1 blue:0.0 alpha:0.1]; 
      [toggleButton.layer setBorderWidth:4.0]; 
      [toggleButton.layer setBorderColor:[[UIColor lightGrayColor] CGColor]]; 
      toggleButton.layer.cornerRadius=4.0; 
      [toggleButton setTitleColor:[UIColor colorWithRed:0.3 green:0.1 blue:0.4 alpha:1.0] forState:UIControlStateNormal]; 

      // add it, centered 
      [self addSubview:toggleButton]; 
    } 
    return self; 
} 

- (void)wasDragged:(UIButton *)button withEvent:(UIEvent *)event 
{ 
     NSLog(@"inside drag"); 
} 

將CustomView添加到ViewController中：

CustomView *slider=[[CustomView alloc]initWithFrame:CGRectMake(x, y, width, height)]; 
[self.view addSubview:slider]; 

我測試此代碼，它的工作原理:)

Answer 2

替換該行

[toggleButton addTarget:self action:@selector(wasDragged:withEvent:) 
     forControlEvents:UIControlEventTouchDragInside]; 

與此

[toggleButton addTarget:self action:@selector(wasDragged:withEvent:) 
     forControlEvents:UIControlEventTouchUpInside]; 

希望這將工作

Answer 3

你在哪裏把方法wasDragged：withEvent？因爲在CustomView代碼中，您將按鈕目標設置爲self，即customview。所以按鈕TouchDragInside事件將被髮送到customview而不是viewController。如果你在ViewController中放置了wasDragged：withEvent，它不會工作

Answer 4

你添加了目標爲self的行動wasDragged:withEvent。對於這個工作（假設wasDragged:withEvent在您自定義視圖聲明），您必須將代碼重寫

[toggleButton addTarget:slider action:@selector(wasDragged:withEvent:) 
     forControlEvents:UIControlEventTouchDragInside];