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 UIButtonfor (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。

转自：http://www.cnblogs.com/mybkn/archive/2012/08/14/2638002.html