環境:Xcode 4.2 + iOS SDK 5
目標:
- 練習使用 UIScrollView
HomeViewCtrl.h
#import <UIKit/UIKit.h>
@interface HomeViewCtrl : UIViewController
@property(nonatomic, strong) UIScrollView * scrollView;
@property(nonatomic, strong) UILabel * label;
@end
HomeViewCtrl.m
#import "HomeViewCtrl.h"
@implementation HomeViewCtrl
@synthesize scrollView, label;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (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.
}
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad
{
//取得螢幕的尺寸
//bounds = 螢幕範圍
//applicationFrame = bounds 扣除狀態列佔據的空間
CGRect screenRect = [[UIScreen mainScreen] applicationFrame];
CGFloat screenWidth = screenRect.size.width;
CGFloat screenHeight = screenRect.size.height;
//配置 scrollView
//scrollView 的尺寸跟螢幕一樣大,但是內容在高度的方向加大
scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, screenWidth, screenHeight)];
scrollView.contentSize = CGSizeMake(screenWidth, (screenHeight + 300));
scrollView.scrollEnabled = YES;
[self.view addSubview:scrollView];
//配置一個 label,以便提供視覺參考
label = [[UILabel alloc] initWithFrame:CGRectMake(80, 100, 100, 50)];
label.text = @"ScrollView Test";
[self.scrollView addSubview:label];
[super viewDidLoad];
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
@end
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