iPhone开发学习笔记004——自定义背景透明非全屏弹出窗口，子类化UIWindow

最终要实现的效果如下，点击上面的按钮可以弹出一个背景透明非全屏的弹出窗口，不使用UIActionSheet和UIAlertView.

下面说说具体过程。

一、新建一个single view application工程，并且添加相关的控件并拖拽连接：
如下图：

 

新建一个OC类，继承自UIWindow，如下图：







 
 
 CustomWindow.h:
 
#import <UIKit/UIKit.h>
 
 
 
 
@interface CustomWindow :UIWindow {
 
    UIView *superView;
 
    UIView *backgroundView;
 
    UIImageView *backgroundImage;
 
    UIView *contentView;
 
    BOOL closed;
 
}
 
 
 
 
@property (nonatomic,retain)UIView *superView;
 
@property (nonatomic,retain)UIView *backgroundView;
 
@property (nonatomic,retain)UIImageView *backgroundImage;
 
@property (nonatomic,retain)UIView *contentView;
 
 
 
 
-(CustomWindow *)initWithView:(UIView *)aView;
 
-(void)show;
 
-(void)close;
 
 
 
 
@end
 
 
CustomWindow.m:
 
#import "CustomWindow.h"
 
 
 
 
@implementation CustomWindow
 
 
 
 
@synthesize superView;
 
@synthesize backgroundView;
 
@synthesize backgroundImage;
 
@synthesize contentView;
 
 
 
 
-(UIImage *) pngWithPath:(NSString *)path
 
{
 
    NSString *fileLocation = [[NSBundlemainBundle]pathForResource:path ofType:@"png"];
 
    NSData *imageData = [NSDatadataWithContentsOfFile:fileLoc