[英]Adding addTarget: method to custom UIView
I created a custom UIView something like UIStepper, because I don't like the appearance of the UIStepper. 我创建了一个类似于UIStepper的自定义UIView,因为我不喜欢UIStepper的外观。 I want UIStepper have a personal count label so I added it to my custom view and created a method to increase-decrease it. 我希望UIStepper具有个人计数标签,所以我将其添加到自定义视图中并创建了一种增加或减少它的方法。 Now I need a [customView addTarget:(id) action:(del) forControlEvents:(UIControlEvents)] method to catch UIControlEventValueChanged ; 现在,我需要一个[customView addTarget:(id)action:(del)forControlEvents:(UIControlEvents)]方法来捕获UIControlEventValueChanged ; but I couldn't find anything about implementing it. 但我找不到实现它的任何方法。 I dig around the UIButton.h, UIStepper.h files but no luck too.. Can anyone help me to do that? 我在UIButton.h,UIStepper.h文件中进行挖掘,但是也没有运气。有人可以帮助我做到这一点吗?
Here is how I created the custom view... 这是我创建自定义视图的方式...
CounterView.h CounterView.h
#import <UIKit/UIKit.h>
@interface CounterView : UIView
@property NSString* name;
@property NSInteger count;
@property UILabel *label;
@property NSInteger customTag;
- (id)initWithX:(CGFloat)xPoint WithY:(CGFloat)yPoint WithName:(NSString*)newName withCount:(NSInteger)newCount withCustomTag:(NSInteger)newTag;
@end
CounterView.m CounterView.m
@implementation CounterView
- (id)initWithX:(CGFloat)xPoint WithY:(CGFloat)yPoint WithName:(NSString*)newName withCount:(NSInteger)newCount withCustomTag:(NSInteger)newTag
{
self = [super initWithFrame:CGRectMake(xPoint, yPoint, 24, 52)];
if (self) {
self.customTag = newTag;
self.count = newCount;
self.name = newName;
UIButton *btnUp = [[UIButton alloc] initWithFrame:CGRectMake(3, 2, 18, 12)];
[btnUp setImage:[UIImage imageNamed:@"top.png"] forState:UIControlStateNormal];
[btnUp addTarget:self action:@selector(increaseValue) forControlEvents:UIControlEventTouchUpInside];
UIButton *btnDown = [[UIButton alloc] initWithFrame:CGRectMake(3, 38, 18, 12)];
[btnDown setImage:[UIImage imageNamed:@"bottom.png"] forState:UIControlStateNormal];
[btnDown addTarget:self action:@selector(decreaseValue) forControlEvents:UIControlEventTouchUpInside];
self.label = [[UILabel alloc] initWithFrame:CGRectMake(0, 14, 24, 24)];
[self.label setText:[NSString stringWithFormat:@"%ld", (long)self.count]];
self.label.textAlignment = NSTextAlignmentCenter;
[self addSubview:btnUp];
[self addSubview:btnDown];
[self addSubview:self.label];
}
return self;
}
-(void) increaseValue{
self.count++;
[self.label setText:[NSString stringWithFormat:@"%ld", (long)self.count]];
}
-(void) decreaseValue{
self.count--;
[self.label setText:[NSString stringWithFormat:@"%ld", (long)self.count]];
}
@end
Just allow the actions to be set from outside of your control. 只需允许从控件外部设置操作即可。 Here is how to do it: 这是操作方法:
@interface CounterView : UIView
...
@property(nonatomic, strong) UIButton *btnUp;
@property(nonatomic, strong) UIButton *btnDown;
- (void)addUpTarget:(id)target action:(SEL)action;
- (void)addDownTarget:(id)target action:(SEL)action;
@end
@implementation CounterView
...
- (void)addUpTarget:(id)target action:(SEL)action
{
[_btnUp addTarget:target action:action forControlEvents:UIControlEventTouchUpInside];
}
- (void)addDownTarget:(id)target action:(SEL)action
{
[_btnDonw addTarget:target action:action forControlEvents:UIControlEventTouchUpInside];
}
...
@end
Then use methods: 然后使用方法:
- (void)addUpTarget:(id)target action:(SEL)action;
- (void)addDonwTarget:(id)target action:(SEL)action;
to set a target and actions for increasing and decreasing the values. 设定增加和减少值的目标和措施。
in the ViewController where you instantiate your CounterView you add this 在实例化CounterView的ViewController中,添加此代码
UITapGestureRecognizer *singleFingerTap =
[[UITapGestureRecognizer alloc] initWithTarget:self
action:@selector(handleSingleTap:)];
[yourViewInstantiation addGestureRecognizer:singleFingerTap];
[singleFingerTap release];
and the you implement the call back method: 并且您实现了回调方法:
- (void)handleSingleTap:(UITapGestureRecognizer *)recognizer {
CGPoint location = [recognizer locationInView:[recognizer.view superview]];
//Do stuff here...
}
i hope that help you ! 希望对您有所帮助!
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