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[英]How can I force UIAlertView to display the full message without scrolling when in landscape mode?
[英]How can I reload UIAlertView message
我從github上獲得了這個項目。
它是自定義的AlertView。 我了解它是如何工作的。 為我的項目修改它,像這樣
Course1-某種產品的名稱,而'1'-是其數量。 當我輸入正負號時,金額會增加/減少。 但這僅適用於我的變量(在顯示該變量時加載到此AlertView上,它為1)。 如何通過更改var(金額)來重新加載此警報視圖的消息。 我聽不懂 這是我的代碼。
在我的課堂上,我通過此代碼調用警報視圖
BlockAlertView *alert = [BlockAlertView alertWithTitle: title message:ac.acCount];
[alert setCancelButtonWithTitle:@"-" block:nil];
[alert setDestructiveButtonWithTitle:@"+" block:^{
int u = [ac.acCount intValue];
u++;
ac.acCount = [NSString stringWithFormat:@"%d", u];
NSLog(@"%d", u);
}];
[alert addButtonWithTitle:@"Ok" block:^{
NSMutableArray *container = [[NSMutableArray alloc] init];
[container addObject:title];
[container addObject:price];
[container addObject:bId];
[container addObject:ac.acCount];
[container addObject:depid];
[[NSNotificationCenter defaultCenter] postNotificationName:@"MyNotification" object:container];
}];
[alert show];
Show方法僅使用來自alertWithTitle:title message:ac.acCount的參數繪制警報視圖。 這是代碼
+ (BlockAlertView *)alertWithTitle:(NSString *)title message:(NSString *)message
{
return [[[BlockAlertView alloc] initWithTitle:title message:message] autorelease];
}
這是
- (id)initWithTitle:(NSString *)title message:(NSString *)message
{
NSLog(@"title - %@ message - %@", title, message);
if ((self = [super init]))
{
UIWindow *parentView = [BlockBackground sharedInstance];
CGRect frame = parentView.bounds;
frame.origin.x = floorf((frame.size.width - background.size.width) * 0.5);
frame.size.width = background.size.width;
_view = [[UIView alloc] initWithFrame:frame];
_blocks = [[NSMutableArray alloc] init];
_height = kAlertViewBorder + 6;
if (title)
{
CGSize size = [title sizeWithFont:titleFont
constrainedToSize:CGSizeMake(frame.size.width-kAlertViewBorder*2, 1000)
lineBreakMode:UILineBreakModeWordWrap];
UILabel *labelView = [[UILabel alloc] initWithFrame:CGRectMake(kAlertViewBorder, _height, frame.size.width-kAlertViewBorder*2, size.height)];
labelView.font = titleFont;
labelView.numberOfLines = 0;
labelView.lineBreakMode = UILineBreakModeWordWrap;
labelView.textColor = kAlertViewTitleTextColor;
labelView.backgroundColor = [UIColor clearColor];
labelView.textAlignment = UITextAlignmentCenter;
labelView.shadowColor = kAlertViewTitleShadowColor;
labelView.shadowOffset = kAlertViewTitleShadowOffset;
labelView.text = title;
[_view addSubview:labelView];
[labelView release];
_height += size.height + kAlertViewBorder;
}
if (message)
{
CGSize size = [message sizeWithFont:messageFont
constrainedToSize:CGSizeMake(frame.size.width-kAlertViewBorder*2, 1000)
lineBreakMode:UILineBreakModeWordWrap];
UILabel *labelView = [[UILabel alloc] initWithFrame:CGRectMake(kAlertViewBorder, _height, frame.size.width-kAlertViewBorder*2, size.height)];
labelView.font = messageFont;
labelView.numberOfLines = 0;
labelView.lineBreakMode = UILineBreakModeWordWrap;
labelView.textColor = kAlertViewMessageTextColor;
labelView.backgroundColor = [UIColor clearColor];
labelView.textAlignment = UITextAlignmentCenter;
labelView.shadowColor = kAlertViewMessageShadowColor;
labelView.shadowOffset = kAlertViewMessageShadowOffset;
labelView.text = message;
[_view addSubview:labelView];
[labelView release];
_height += size.height + kAlertViewBorder;
}
_vignetteBackground = NO;
}
return self;
}
我試圖用這樣的東西
-(void)reloadAlertView: (NSString *) title: (NSString *) message{
[self initWithTitle:title message:message];
}
並從我的班級中調用它,在這里我顯示警報視圖。
[alert reloadAlertView: title: newMessage];
您需要在CustomAlertView.h中引用新標簽
@property (nonatomic, strong) IBOutlet UILabel *mylab;
那么您可以通過CustomAlertView.h類的對象獲取此標簽的屬性
BlockAlertView *alert ...;
alert.mylab.text = @"hello";
BlockAlertView.m
),只要單擊+
按鈕,警報就會消失,然后再次出現。 ViewController.m
@implementation ViewController {
BlockAlertView *alert ;
NSInteger value;
}
-(void) viewDidLoad {
value = 0;
[self reloadAlert];
}
-(void) reloadAlert {
value += 1;
__block ViewController* _self = self;
alert = [[BlockAlertView alloc] initWithTitle:@"Course1" message:[[[NSNumber alloc] initWithInteger:value ] stringValue]];
[alert setDestructiveButtonWithTitle:@"PLUS" block:^{
[_self reloadAlert];
}];
[alert show];
}
}
AlertView
而不彈出。 一種。 修改BlockAlertView.h
以將messageLabelView
帶到外部,以便可以從ViewController
進行訪問,以便稍后重新繪制消息。
BlockAlertView.h
@interface BlockAlertView {
...
}
@property (nonatomic, retain) UILabel *messageLabelView;
您也可以帶來UIView *_view
出@protected
進入@property
相反,如果首選。 在這種情況下,可以通過_view的子視圖訪問messageLabelView
b。 修改BlockAlertView.m
dismissWithClickedButtonIndex:animated:
如果buttonIndex == PLUS
標記button- buttonIndex
硬編碼為0
,則禁用removeView
函數。
也許有更好的選擇來停止加號按鈕的塊obj內的執行線程,但我不知道該怎么做:)
C。 修改BlockAlert.m
initWithTitle:message:
以在呈現消息Label的過程中將messageLabelView
引用添加到labelView
中。
BlockAlertView.m
@synthesize messageLabelView;
- (id)initWithTitle:(NSString *)title message:(NSString *)message
{
...
// code to initialize messageLabelView
if (message)
{
....
// code to render labelView for message. add reference to messageLabelView
messageLabelView = labelView;
// [labelView release];
}
}
- (void)dismissWithClickedButtonIndex:(NSInteger)buttonIndex animated:(BOOL)animated
{
if (buttonIndex >= 0 && buttonIndex < [_blocks count])
{
id obj = [[_blocks objectAtIndex: buttonIndex] objectAtIndex:0];
if (![obj isEqual:[NSNull null]])
{
((void (^)())obj)();
}
}
// there may be a better option to stop the execution thread inside the block obj above
if(buttonIndex == 0) {// or whatever index of Plus Button, dont removeView
return;
}
// code to removeView below, keep as usual
if (animated)
{
...
}
else
{
....
}
}
}
d。 在ViewController.m
更改reloadAlert
ViewController.m
-(void) reloadAlert {
value += 1;
alert.messageLabelView.text = [[[NSNumber alloc] initWithInteger:value ] stringValue];
[alert.messageLabelView setNeedsDisplay];
}
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