主视图有标签和按钮。我添加了一个包含UILabel和按钮的子视图。我想要做的是，我想通过按两个按钮之一更新两个视图中的两个标签。 问题是，如果我点击子视图的按钮，子视图的标签只会更新。相反，只有在主视图中单击按钮时才会更改主视图的标签。
我想知道如何更新另一个视图的每个label.text。
提前致谢...
这是我的代码。 1. ViewController.h
#import <UIKit/UIKit.h>
#import "SubView.h"
@interface ViewController : UIViewController{
SubView *subView;
}
@property (weak, nonatomic) SubView *subView;
@property (retain, nonatomic) IBOutlet UILabel *amount;
@end
2。 ViewController.m
#import "ViewController.h"
#import "SubView.h"
@interface ViewController ()
@end
@implementation ViewController
@synthesize subView=_subView;
@synthesize amount;
- (void)viewDidLoad
{
[super viewDidLoad];
subView = [[SubView alloc]initWithFrame:CGRectMake(10, 10, 300, 600)];
[self.view addSubview:subView];
amount = [[UILabel alloc]initWithFrame:CGRectMake(400, 400, 100, 50)];
amount.text = @"test in the main view";
[self.view addSubview:amount];
UIButton *btn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
btn.frame = CGRectMake(400, 300, 40, 20);
btn.backgroundColor = [UIColor clearColor];
[btn addTarget:self action:@selector(labelChange:)
forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btn]; // add a button in the main view
// Do any additional setup after loading the view, typically from a nib.
}
- (IBAction)labelChange:(id)sender{
amount.text = @"defaul label";
SubView *sv = [[SubView alloc]init];
sv.addObject2.text = @"label in the subview";
NSLog(@"sv.addObject2.text = %@",sv.addObject2);
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return YES;
}
@end
3。 SubView.h
#import <UIKit/UIKit.h>
@interface SubView : UIView {
UIButton *btn;
UILabel *label;
}
//@property (strong, nonatomic) UIView *view;
@property (weak, nonatomic) UIButton *btn;
@property (weak, nonatomic) UILabel *label;
- (UIButton *)addObject1;
- (UILabel *)addObject2;
@end
4。 SubView.m
#import "SubView.h"
#import "ViewController.h"
@implementation SubView
@synthesize btn=_btn, label=_label;
//@synthesize view;
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
//UIView *contentView = [[UIView alloc]initWithFrame:frame];
self.backgroundColor = [UIColor blackColor];
UIButton *object1 = [self addObject1];
UILabel *object2 = [self addObject2];
[self addSubview:object1];
[self addSubview:object2];
return self;
}
- (UIButton *)addObject1{
btn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
btn.frame = CGRectMake(10, 10, 100, 20);
btn.backgroundColor = [UIColor clearColor];
[btn addTarget:self action:@selector(labelChange:) forControlEvents:UIControlEventTouchUpInside];
return btn;
}
- (IBAction)labelChange:(id)sender{
label.text = @"change the label in the subview";
ViewController *vc = [[ViewController alloc]init];
[vc.amount setText:@"change the label in the mainview"];
}
- (UILabel *)addObject2{
label = [[UILabel alloc]initWithFrame:CGRectMake(10, 50, 200, 50)];
[label setText: @"default"];
label.backgroundColor = [UIColor clearColor];
label.font = [UIFont fontWithName:@"Arial" size:12];
label.textColor = [UIColor whiteColor];
return label;
}
@end
答案 0 :(得分：0)
我想我得到了你想做的事情，这就是你应该做的事情：
1-创建3个新文件（xib，m，h）称它们为SubView.xib，m，h。你必须确保它继承了UIView。
xib文件中的2-绘制子视图元素并用它挂钩IBOutlets。但请确保文件所有者是ViewController，根视图类类型是“SubView”
3-在ViewController中创建一个Subview类型的IBOutlet
4-打开SubView.xib并使用您创建的文件所有者IBOutlet挂钩SubView（对象树中的根节点）@ step 3
在ViewController.m中加载新的SubView只需调用以下行： 在该行之后，ViewController中的IBOutlet将具有SubView的对象。
[[NSBundle mainBundle] loadNibNamed:@"SubView" owner:self options:nil];
在上面的代码中，self被反映到ViewController
答案 1 :(得分：0)
我想你需要阅读“The Objective-C Programming Language”并知道“对象”和“指针”的含义
这是代码
SubView.h
#import <UIKit/UIKit.h>
@interface SubView : UIView {
UIButton *btn;
UILabel *label;
}
@property (weak, nonatomic) UIViewController *vc;
@property (weak, nonatomic) UIButton *btn;
@property (weak, nonatomic) UILabel *label;
- (UIButton *)addObject1;
- (UILabel *)addObject2;
@end
Subview.m
#import "SubView.h"
#import "ViewController.h"
@implementation SubView
@synthesize btn=_btn, label=_label;
@synthesize vc;
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
self.backgroundColor = [UIColor blackColor];
UIButton *object1 = [self addObject1];
UILabel *object2 = [self addObject2];
[self addSubview:object1];
[self addSubview:object2];
return self;
}
- (UIButton *)addObject1{
btn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
btn.frame = CGRectMake(10, 10, 100, 20);
btn.backgroundColor = [UIColor clearColor];
[btn addTarget:self action:@selector(labelChange:) forControlEvents:UIControlEventTouchUpInside];
return btn;
}
- (IBAction)labelChange:(id)sender{
label.text = @"change the label in the subview";
[vc.amount setText:@"change the label in the mainview"];
}
- (UILabel *)addObject2{
label = [[UILabel alloc]initWithFrame:CGRectMake(10, 50, 200, 50)];
[label setText: @"default"];
label.backgroundColor = [UIColor clearColor];
label.font = [UIFont fontWithName:@"Arial" size:12];
label.textColor = [UIColor whiteColor];
return label;
}
@end
ViewController.m
#import "ViewController.h"
#import "SubView.h"
@interface ViewController ()
@end
@implementation ViewController
@synthesize subView=_subView;
@synthesize amount;
- (void)viewDidLoad
{
[super viewDidLoad];
subView = [[SubView alloc]initWithFrame:CGRectMake(10, 10, 300, 600)];
subView.vc = self;
[self.view addSubview:subView];
amount = [[UILabel alloc]initWithFrame:CGRectMake(400, 400, 100, 50)];
amount.text = @"test in the main view";
[self.view addSubview:amount];
UIButton *btn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
btn.frame = CGRectMake(400, 300, 40, 20);
btn.backgroundColor = [UIColor clearColor];
[btn addTarget:self action:@selector(labelChange:)
forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btn]; // add a button in the main view
}
- (IBAction)labelChange:(id)sender{
amount.text = @"defaul label";
subview.addObject2.text = @"label in the subview";
}
@end