iphone開發-透過按鈕切換view

這次我將程式分開成兩個class來寫 順便練習怎麼各自呼叫對方的method 另外我這次設計了兩個xib 當一開始classA的xib載入後 我按下按鈕之後 程式能切換到class B的xib

test12ViewController.h

// forward declaration
@class Testcontroller;

@interface test12ViewController : UIViewController {

//另外一個class
Testcontroller *testcontroller;

}
//以下這樣寫 就可以使用dot syntax
@property(nonatomic,retain)Testcontroller *testcontroller;
//用來切換不同的view
-(IBAction)change:(id)sender;
-(int)display;


@end

test12ViewController.m

#import " test12ViewController.h "
//用Testcontroller產生一個instance object
#import " Testcontroller.h "

@implementation test12ViewController
@synthesize testcontroller;

-(IBAction)change:(id)sender
{
if (self.testcontroller==nil) {
//載入Testcontroller的xib
Testcontroller *testcontrollertemp=[[Testcontroller alloc]initWithNibName:@"Testcontroller" bundle:nil];
self.testcontroller=testcontrollertemp;

[testcontrollertemp release];
//加到原本的view上面
[self.view addSubview:testcontroller.view];

}
}
-(int)display
{
int x=5;
return x;
}

- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];

// Release any cached data, images, etc that aren't in use.
}

- (void)viewDidUnload {
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}


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

@end

testcontroller.m

#import " Testcontroller.h "
//必須記得import以下 因為要產生test12ViewController的instance
//若沒有加入這段 會出現 "XXX may not respond to class"
#import " test12ViewController.h "


@implementation Testcontroller
@synthesize display;






- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];

// Release any cached data, images, etc that aren't in use.
}

- (void)viewDidUnload {
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}

-(IBAction)test:(id)sender
{
int y;
//產生test12ViewController的instance
test12ViewController *integer=[[test12ViewController alloc]init];
//透過這個instance 去呼叫test12ViewController的method
y=[integer display];
//將int轉換成字串
NSString *dispalytext=[[NSString alloc]initWithFormat:@"%d",y];
display.text=dispalytext;
[integer release];
[dispalytext release];

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


@end