iphone:自定义UIAlertView-程序员宅基地

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。