[button addTarget：self action：@selector（showCCView）forControlEvents：UIControlEventTouchUpInside];
现在showCCView方法是在loadView之外定义的，上面的语句位于此处。方法的要点是更改当前屏幕上的视图（因此设置self.view = ccView）。每次我尝试在loadView之外访问self.view时都会出现错误，甚至有时当我尝试在loadView中的随机位置访问它时，它只是表现得非常奇怪。
我试图改变它，所以我也不必处理这个问题。我做了一个函数+（void）showView：（UIView *）oldView：（UIView *）newView;但这并没有成功，因为@Selector在使用需要两个参数的函数时非常谨慎。
请帮忙吗？
这是我的代码：
//
// SiteOneController.m
// InstantNavigator
//
// Created by dni on 2/22/10.
// Copyright 2010 __MyCompanyName__. All rights reserved.
//
#import "SiteOneController.h"
@implementation SiteOneController
+ (UIView*) ccContent {
UIView *ccContent = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]];
ccContent.backgroundColor = [UIColor whiteColor];
[ccContent addSubview:[SiteOneController myNavBar1:@"Constitution Center Content"]];
return ccContent;
}
// Button Dimensions
int a = 62;
int b = 80;
int c = 200;
int d = 30;
// NPSIN Green Color
+ (UIColor*)myColor1 {
return [UIColor colorWithRed:0.0f/255.0f green:76.0f/255.0f blue:29.0f/255.0f alpha:1.0f];
}
// Creates Nav Bar with default Green at top of screen with given String as title
+ (UINavigationBar*)myNavBar1: (NSString*)input {
UIView *test = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]];
UINavigationBar *navBar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0.0, 0.0, test.bounds.size.width, 45)];
navBar.tintColor = [SiteOneController myColor1];
UINavigationItem *navItem;
navItem = [UINavigationItem alloc];
navItem.title = input;
[navBar pushNavigationItem:navItem animated:false];
return navBar;
}
//-------------------------------------------------------------------------------------------//
//-------------------------------------------------------------------------------------------//
//-------------------------------------------------------------------------------------------//
// Implement loadView to create a view hierarchy programmatically, without using a nib.
- (void)loadView {
//hard coded array of content for each site
// CC
NSMutableArray *allccContent = [[NSMutableArray alloc] init];
NSString *cc1 = @"House Model";
NSString *cc2 = @"James Dexter History";
[allccContent addObject: cc1];
[cc1 release];
[allccContent addObject: cc2];
[cc2 release];
// FC
NSMutableArray *allfcContent = [[NSMutableArray alloc] init];
NSString *fc1 = @"Ghost House";
NSString *fc2 = @"Franklins Letters";
NSString *fc3 = @"Franklins Business";
[allfcContent addObject: fc1];
[fc1 release];
[allfcContent addObject: fc2];
[fc2 release];
[allfcContent addObject: fc3];
[fc3 release];
// PC
NSMutableArray *allphContent = [[NSMutableArray alloc] init];
NSString *ph1 = @"Changing Occupancy";
NSString *ph2 = @"Sketches";
NSString *ph3 = @"Servant House";
NSString *ph4 = @"Monument";
NSString *ph5 = @"Virtual Model";
[allphContent addObject: ph1];
[ph1 release];
[allphContent addObject: ph2];
[ph2 release];
[allphContent addObject: ph3];
[ph3 release];
[allphContent addObject: ph4];
[ph4 release];
[allphContent addObject: ph5];
[ph5 release];
// Each content page's view
//UIView *ccContent = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]];
UIView *fcContent = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]];
UIView *phContent = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]];
//ccContent.backgroundColor = [UIColor whiteColor];
fcContent.backgroundColor = [UIColor whiteColor];
phContent.backgroundColor = [UIColor whiteColor];
//[ccContent addSubview:[SiteOneController myNavBar1:@"Constitution Center Content"]];
[fcContent addSubview:[SiteOneController myNavBar1:@"Franklin Court Content"]];
[phContent addSubview:[SiteOneController myNavBar1:@"Presidents House Content"]];
//allocate the view
self.view = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]];
//set the view's background color
self.view.backgroundColor = [UIColor whiteColor];
[self.view addSubview:[SiteOneController myNavBar1:@"Sites"]];
NSMutableArray *sites = [[NSMutableArray alloc] init];
NSString *one = @"Constution Center";
NSString *two = @"Franklin Court";
NSString *three = @"Presidents House";
[sites addObject: one];
[one release];
[sites addObject: two];
[two release];
[sites addObject: three];
[three release];
NSString *ccName = @"Constitution Center";
NSString *fcName = @"Franklin Court";
NSString *element;
int j = 0;
for (element in sites)
{
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
//setframe (where on screen)
//separation is 15px past the width (45-30)
button.frame = CGRectMake(a, b + (j*45), c, d);
[button setTitle:element forState:UIControlStateNormal];
button.backgroundColor = [SiteOneController myColor1];
/*- (void) fooFirstInput:(NSString*) first secondInput:(NSString*) second {
NSLog(@"Logs %@ then %@", first, second);
}
- (void) performMethodsViaSelectors {
[self performSelector:@selector(fooNoInputs)];
[self performSelector:@selector(fooOneInput:) withObject:@"first"];
[self performSelector;@selector(fooFirstInput:secondInput:) withObject:@"first" withObject:@"second"];*/
//UIView *old = self.view;
if (element == ccName) {
[button addTarget:self action:@selector(showCCView)
forControlEvents:UIControlEventTouchUpInside];
}
else if (element == fcName) {
}
else {
}
[self.view addSubview: button];
j++;
}
}
// This method show the content views for each of the sites.
/*+ (void) showCCView {
self.view = [SiteOneController ccContent];
}*/
答案 0 :(得分：1)
您正在尝试使用相同的View控制器实例来控制多个View对象，这些对象无法正常工作。如果要转换为显示另一个视图，则应使用其他视图控制器显示它，或者至少将新视图添加为窗口的子视图。