UIActionSheet類系IOS開發中實現警告框的重要的類，而在好多應用中，都對它進行了擴展，今天介紹一下自定義風格的UIActionSheet
一、自定義CustomActionSheet類
CustomActionSheet類繼承UIActionSheet，具體的實現如下所示：
1）CustomActionSheet.h頭文件
#import <Foundation/Foundation.h>
@interface CustomActionSheet : UIActionSheet {
UIToolbar* toolBar;
UIView* view;
}
@property(nonatomic,retain)UIView* view;
@property(nonatomic,retain)UIToolbar* toolBar;
/*因為是通過給ActionSheet 加 Button來改變ActionSheet, 所以大小要與actionsheet的button數有關
*height = 84, 134, 184, 234, 284, 334, 384, 434, 484
*如果要用self.view = anotherview. 那么another的大小也必須與view的大小一樣
*/
-(id)initWithHeight:(float)height WithSheetTitle:(NSString*)title;
@end
2）CustomActionSheet.m實現文件
#import "CustomActionSheet.h"
@implementation CustomActionSheet
@synthesize view;
@synthesize toolBar;
-(id)initWithHeight:(float)height WithSheetTitle:(NSString*)title
{
self = [super init];
if (self)
{
int theight = height - 40;
int btnnum = theight/50;
for(int i=0; i<btnnum; i++)
{
[self addButtonWithTitle:@" "];
}
toolBar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 320, 44)];
toolBar.barStyle = UIBarStyleBlackOpaque;
UIBarButtonItem *titleButton = [[UIBarButtonItem alloc] initWithTitle:title
style:UIBarButtonItemStylePlain
target:nil
action:nil];
UIBarButtonItem *rightButton = [[UIBarButtonItem alloc] initWithTitle:@"Done"
style:UIBarButtonItemStyleDone
target:self
action:@selector(done)];
UIBarButtonItem *leftButton = [[UIBarButtonItem alloc] initWithTitle:@"Cancel"
style:UIBarButtonItemStyleBordered
target:self
action:@selector(docancel)];
UIBarButtonItem *fixedButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace
target:nil
action:nil];
NSArray *array = [[NSArray alloc] initWithObjects:leftButton,fixedButton,titleButton,fixedButton,rightButton,nil];
[toolBar setItems: array];
[titleButton release];
[leftButton release];
[rightButton release];
[fixedButton release];
[array release];
[self addSubview:toolBar];
view = [[UIView alloc] initWithFrame:CGRectMake(0, 44, 320, height-44)];
view.backgroundColor = [UIColor groupTableViewBackgroundColor];
[self addSubview:view];
}
return self;
}
-(void)done
{
[self dismissWithClickedButtonIndex:0 animated:YES];
}
-(void)docancel
{
[self dismissWithClickedButtonIndex:0 animated:YES];
}
-(void)dealloc
{
[view release];
[super dealloc];
}
@end
二、利用自定義的CustomActionSheet類顯示提示框
#import "TestActionSheetViewController.h"
#import "CustomActionSheet.h"
@implementation TestActionSheetViewController
-(IBAction)btndown
{
CustomActionSheet* sheet = [[CustomActionSheet alloc] initWithHeight:284.0f
WithSheetTitle:@"自定義ActionSheet"];
UILabel* label = [[UILabel alloc] initWithFrame:CGRectMake(0,50, 320, 50)];
label.text = @"這里是要自定義放的控制";
label.backgroundColor = [UIColor clearColor];
label.textAlignment = UITextAlignmentCenter;
[sheet.view addSubview:label];
[sheet showInView:self.view];
[sheet release];
}
@end
這里的UILabel是作一個示例，在這個位置你可以換成你自己的內容即可；
三、效果圖
