iPhone SDK develop & programming tips

key name                        value type    value
 
UIRequiresPersistentWiFi     Boolean        true

//
//  UICustomSwitch.h
//  UICatalog
//
//  Created by aish on 09-2-25.
//  Copyright 2009  .. All rights reserved.
//
 
#import <UIKit/UIKit.h>
 
// 该方法时SDK文档中没有的， 添加一个category
@interface UISwitch (extended)
- (void) setAlternateColors:(BOOL) boolean;
@end
// 自定义Slider 类
@interface _UISwitchSlider : UIView
@end
 
 
@interface UICustomSwitch : UISwitch {
 
}
- (void) setLeftLabelText:(NSString *)labelText
                     font:(UIFont*)labelFont
                    color: (UIColor *)labelColor;
- (void) setRightLabelText:(NSString *)labelText
                      font:(UIFont*)labelFont
                     color:(UIColor *)labelColor;
- (UILabel*) createLabelWithText:(NSString*)labelText
                            font:(UIFont*)labelFont
                           color:(UIColor*)labelColor;
 
@end

//
//  UICustomSwitch.m
//  UICatalog
//
//  Created by aish on 09-2-25.
//  Copyright 2009.. All rights reserved.
//
 
#import "UICustomSwitch.h"
 
 
 
@implementation UICustomSwitch
 
 
- (id)initWithFrame:(CGRect)frame {
    if (self = [super initWithFrame:frame]) {
        // Initialization code
    }
    return self;
}
 
 
- (void)drawRect:(CGRect)rect {
    // Drawing code
}
 
 
- (void)dealloc {
    [super dealloc];
}
 
- (_UISwitchSlider *) slider {
    return [[self subviews] lastObject];
}
- (UIView *) textHolder {
    return [[[self slider] subviews] objectAtIndex:2];
}
- (UILabel *) leftLabel {
    return [[[self textHolder] subviews] objectAtIndex:0];
}
- (UILabel *) rightLabel {
    return [[[self textHolder] subviews] objectAtIndex:1];
}
 
// 创建文本标签
- (UILabel*) createLabelWithText:(NSString*)labelText
                            font:(UIFont*)labelFont
                           color:(UIColor*)labelColor
{
    CGRect rect = CGRectMake(-25.0f, -10.0f, 50.0f, 20.0f);
    UILabel *label = [[UILabel alloc] initWithFrame: rect];
    label.text = labelText;
    label.font = labelFont;
    label.textColor = labelColor;
    label.textAlignment = UITextAlignmentCenter;
    label.backgroundColor = [UIColor clearColor];
 
    return label;
}
 
// 重新设定左边的文本标签
- (void) setLeftLabelText:(NSString *)labelText
                     font:(UIFont*)labelFont
                    color:(UIColor *)labelColor
{
    @try {
        //
        [[self leftLabel] setText:labelText];
        [[self leftLabel] setFont:labelFont];
        [[self leftLabel] setTextColor:labelColor];
    } @catch (NSException *ex) {
        // 
        UIImageView* leftImage = (UIImageView*)[self leftLabel];
        leftImage.image = nil;
        leftImage.frame = CGRectMake(0.0f, 0.0f, 0.0f, 0.0f);
 
        //
        [leftImage addSubview: [[self createLabelWithText:labelText
                                                     font:labelFont
                                                    color:labelColor] autorelease]];
    }
}
 
// 重新设定右边的文本
- (void) setRightLabelText:(NSString *)labelText font:(UIFont*)labelFont color:(UIColor *)labelColor {
    @try {
        // 
        [[self rightLabel] setText:labelText];
        [[self rightLabel] setFont:labelFont];
        [[self rightLabel] setTextColor:labelColor];
    } @catch (NSException *ex) {
        // 
        UIImageView* rightImage = (UIImageView*)[self rightLabel];
        rightImage.image = nil;
        rightImage.frame = CGRectMake(0.0f, 0.0f, 0.0f, 0.0f);
 
        //
        [rightImage addSubview: [[self createLabelWithText:labelText
                                                      font:labelFont
                                                     color:labelColor] autorelease]];   
    }
}
 
@end

	switchCtl = [[UICustomSwitch alloc] initWithFrame:frame];
 
//	[switchCtl setAlternateColors:YES];
	[switchCtl setLeftLabelText:@"Yes"
                            font:[UIFont boldSystemFontOfSize: 17.0f]
                           color:[UIColor whiteColor]];
    [switchCtl setRightLabelText:@"No"
                             font:[UIFont boldSystemFontOfSize: 17.0f]
                            color:[UIColor grayColor]];

- (void)willPresentAlertView:(UIAlertView *)alertView
{
 
		for( UIView * view in alertView.subviews )
		{
			if( [view isKindOfClass:[UILabel class]] )
			{
				UILabel* label = (UILabel*) view;
				label.textAlignment = UITextAlignmentLeft;
 
			}
		}
}

- (void)willPresentAlertView:(UIAlertView *)alertView
{
	CGRect frame = alertView.frame;
	if( alertView==twitterAlertView )
	{
		frame.origin.y -= 120;
		frame.size.height += 80;
		alertView.frame = frame;
		for( UIView * view in alertView.subviews )
		{
			if( ![view isKindOfClass:[UILabel class]] )
			{
				CGRect btnFrame = view.frame;
				btnFrame.origin.y += 70;
 
				view.frame = btnFrame;
 
			}
		}
		UITextField* accoutName = [[HelperClass createTextField] autorelease];//这里创建一个UITextField对象
		UITextField* accoutPassword = [[HelperClass createTextField] autorelease];//这里创建一个UITextField对象
		accoutName.frame = CGRectMake( 10, 40,frame.size.width - 20, 30 );
		accoutPassword.frame = CGRectMake( 10, 80,frame.size.width -20, 30 );
		accoutName.placeholder = @"Account Name";
		accoutPassword.placeholder = @"Password";
		accoutPassword.secureTextEntry = YES;
		[alertView addSubview:accoutPassword];
		[alertView addSubview:accoutName];
	}
}

NSBundle* bundle = [NSBundle mainBundle];
NSString*  resPath = [bunder resourcePath];
NSString* filePath = [resPath stringByAppendPathComponent:@"test.html"];
 
[WebView loadHTMLString:[NSString stringWithContentsOfFile:filePath] baseURL:[NSURL fileURLWithPath:[bundle bundlePath]]];