iphone:自定义UIAlertView

由于项目中有这样一个需求：需要在保存是弹出框选择保存的地点。选择UIAlertView来实现，但是要在UIAlertView中增加UISwitch的控件，这就需要自定义一个继承UIAlertView的类来自定义UIAlertView了。

实现效果如下：（还没加图的）

我需要在点击确定的时候，知道两个Switch的状态，才能进一步做相应的功能。

自定义了SaveAlertView类。

在.h中，需要自定义一个@protocol，作为把switch状态传出去的出口。

声明相应的委托。看源码

#import <UIKit/UIKit.h>

@protocol SaveAlertViewDelegate <NSObject>

@optional
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex save2File:(BOOL) save2File save2Album:(BOOL) save2Album;
@end

@interface SaveAlertView : UIAlertView

@property(nonatomic, assign) id<SaveAlertViewDelegate> SaveAlertDelegate;
@property(readwrite, retain) UIImage *backgroundImage;
@property(readwrite, retain) UIImage *contentImage;

@property(strong, nonatomic) IBOutlet UISwitch *switch1;
@property(strong, nonatomic) IBOutlet UISwitch *switch2;

- (id)initWithImage:(UIImage *)image contentImage:(UIImage *)content;

@end

在.m中主要是把系统的原来控件隐藏掉（在layoutSubviews中实现），在添加自己控件，及其点击相应代码。

在layoutSubviews中隐藏系统的控件

    for (UIView *v in [self subviews]) {
        if ([v class] == [UIImageView class]){
            [v setHidden:YES];
        }
        if ([v isKindOfClass:[UIButton class]] ||
            [v isKindOfClass:NSClassFromString(@"UIThreePartButton")]) {
            [v setHidden:YES];
        }
    }

看完整的.m代码

#import "SaveAlertView.h"

@implementation SaveAlertView
@synthesize SaveAlertDelegate;
@synthesize backgroundImage;
@synthesize contentImage;
@synthesize switch1;
@synthesize switch2;

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code
    }
    return self;
}

- (id)initWithImage:(UIImage *)image contentImage:(UIImage *)content{
    if (self == [super init]) {
        self.backgroundImage = image;
        self.contentImage = content;
    }
    return self;
}

- (void)drawRect:(CGRect)rect
{
    CGSize imageSize = self.backgroundImage.size;
    [self.backgroundImage drawInRect:CGRectMake(0, 0, imageSize.width, imageSize.height)];
}

- (void) layoutSubviews {
    //屏蔽系统的ImageView 和 UIButton
    for (UIView *v in [self subviews]) {
        if ([v class] == [UIImageView class]){
            [v setHidden:YES];
        }

        if ([v isKindOfClass:[UIButton class]] ||
            [v isKindOfClass:NSClassFromString(@"UIThreePartButton")]) {
            [v setHidden:YES];
        }
    }
    if (contentImage) {
        UIImageView *contentview = [[UIImageView alloc] initWithImage:self.contentImage];
        contentview.frame = CGRectMake(0, 0, backgroundImage.size.width, backgroundImage.size.height);
        [self addSubview:contentview];
    }

    UILabel *label1 = [[UILabel alloc]  initWithFrame:CGRectMake(20, 20, 136, 21)];
    label1.text = @"保存为可编辑文件";
    [self addSubview:label1];

    UILabel *label2 = [[UILabel alloc]  initWithFrame:CGRectMake(20, 65, 85, 21)];
    label2.text = @"另存到相册";
    [self addSubview:label2];

    switch1 = [[UISwitch alloc] initWithFrame:CGRectMake(206, 17, 79, 27)];
    [switch1 setOn:YES];
    [self addSubview:switch1];

    switch2 = [[UISwitch alloc] initWithFrame:CGRectMake(206, 62, 79, 27)];
    [self addSubview:switch2];

    UIButton *button1 = [[UIButton alloc] initWithFrame:CGRectMake(20, 118, 86, 36)];
    button1.tag = 1;
    [button1 setTitle:@"确定" forState:UIControlStateNormal];
    button1.backgroundColor = [UIColor blueColor];
    [button1 addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside];
    [self addSubview:button1];

    UIButton *button2 = [[UIButton alloc] initWithFrame:CGRectMake(199, 118, 86, 36)];
    button2.tag = 2;
    [button2 setTitle:@"取消" forState:UIControlStateNormal];
    button2.backgroundColor = [UIColor blueColor];
    [button2 addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside];
    [self addSubview:button2];

    self.backgroundColor = [UIColor grayColor];
}

-(void) buttonClicked:(id)sender
{
    UIButton *btn = (UIButton *) sender;

    if (SaveAlertDelegate) {
        if ([SaveAlertDelegate respondsToSelector:@selector(alertView:clickedButtonAtIndex:)])
        {
            [SaveAlertDelegate alertView:self clickedButtonAtIndex:btn.tag save2File:[switch1 isOn] save2Album:[switch2 isOn]];
        }
    }

    [self dismissWithClickedButtonIndex:0 animated:YES];

}

- (void) show {
    [super show];
//    CGSize imageSize = self.backgroundImage.size;
//    self.bounds = CGRectMake(0, 0, imageSize.width, imageSize.height);
    self.frame = CGRectMake(350, 300, 320, 191);
}
@end

然后是调用，不要忘记设置委托

            SaveAlertView *savealert = [[SaveAlertView alloc] initWithFrame:CGRectMake(340, 221, 305, 191)];
            savealert.SaveAlertDelegate = self;
            [savealert show];

差不多就是这样了。