编辑线程间传递时失踪:数据使用辛格尔顿
感谢@BlackFrog。我觉得我现在更近,但数值仍然没有得到打通......
的值设置为[progressController updateProgressSummary:...]中所示的日志,当我在progressUpdate登录他们,但都无initWithProgressUpdate:....如下所示。
我对使用哪一个属性progressUpdate或为progressUpdate的3个组件中的每个组件设置的属性稍有困惑。我已经将3个单独的属性从赋值中更改为保留,并且也尝试对整体progressUpdate属性也进行相同操作(此处未显示)。
progressController.h
......
@property (nonatomic, assign) ProgressUpdate *progressUpdate;
progressController.m
// Ask delegate to update and display Progress text
-(void) updateProgressSummary:(NSString *)summary detail:(NSString *)detail percentComplete:(NSNumber *)complete {
// These report the proper values
DLog(@"Reporting Summary - %s", [summary UTF8String]);
DLog(@"Reporting Detail - %s", [detail UTF8String]);
DLog(@"Reporting Complete - %i", [complete intValue]);
if (summary != nil)
self.progressUpdate.summaryText = summary;
self.progressUpdate.detailText = detail;
self.progressUpdate.percentComplete = complete;
ProgressUpdate *progressUpdateForIssue = [[ProgressUpdate alloc] initWithProgressUpdate:progressUpdate];
[self.delegate performSelectorOnMainThread:@selector(displayProgress:) withObject:progressUpdateForIssue waitUntilDone:NO];
[progressUpdateForIssue release];
}
但随后几毫秒后....对象内部..他们没有。
progressUpdate.h
.....
@property (nonatomic, retain) NSString *summaryText;
@property (nonatomic, retain) NSString *detailText;
@property (nonatomic, retain) NSNumber *percentComplete;
progressUpdate.m
-(id) initWithProgressUpdate:(ProgressUpdate *)update {
if ((self = [super init])) {
summaryText = [update.summaryText copy];
detailText = [update.detailText copy];
percentComplete = [[NSNumber alloc] initWithFloat:[update.percentComplete floatValue]];
}
// These report nil values
DLog(@"Reporting in progUpdate summaryText - %s", [summaryText UTF8String]);
DLog(@"Reporting in progUpdate detailText - %s", [detailText UTF8String]);
DLog(@"Reporting in progUpdate percentComplete - %i", [percentComplete intValue]);
return self;
}
更新结束
我需要一些帮助,在传球数据从一个线程到另一个线程的自定义类。它在通过之前,但在抵达后消失。我尝试了我所知道的一切,但无济于事。
我的后台线程调用ProgressController并传递当前进度的详细信息。然后在ProgressController的委托(视图控制器)上执行SelectorOnMainThread来显示细节。
当我传递单个NSString时,它一切正常,但我需要传递两个字符串和一个数字,而performSelectorOnMainThread只能传递一个对象,我已将这些封装在自定义对象 - ProgressUpdate中。
数据正确通过ProgressController,但在View控制器中显示时为空。我知道这是因为我已经把NSLog放在了不同的地方。
不知它做:
多线程和自定义对象
的事实,ProgressController是单身,这就是为什么我那么每次alloc'd新ProgressUpdate它的名字,但这并没有帮助。
任何想法的欢迎。为了清楚起见,代码如下。
ProgressUpdate.h
#import <Foundation/Foundation.h>
@interface ProgressUpdate : NSObject {
NSString *summaryText;
NSString *detailText;
NSNumber *percentComplete;
}
@property (nonatomic, assign) NSString *summaryText;
@property (nonatomic, assign) NSString *detailText;
@property (nonatomic, assign) NSNumber *percentComplete;
-(id) initWith:(ProgressUpdate *)update;
@end
ProgressUpdate.m
#import "ProgressUpdate.h"
@implementation ProgressUpdate
@synthesize summaryText, detailText, percentComplete;
-(id) initWith:(ProgressUpdate *)update {
self = [super init];
self.summaryText = update.summaryText;
self.detailText = update.detailText;
self.percentComplete = update.percentComplete;
return self;
}
@end
ProgressController.m
static ProgressController *sharedInstance;
+ (ProgressController *)sharedInstance {
@synchronized(self) {
if (!sharedInstance)
[[ProgressController alloc] init];
}
return sharedInstance;
}
+(id)alloc {
@synchronized(self) {
NSAssert(sharedInstance == nil, NSLocalizedString(@"Attempted to allocate a second instance of a singleton ProgressController.", @"Attempted to allocate a second instance of a singleton ProgressController."));
sharedInstance = [super alloc];
}
return sharedInstance;
}
-(id) init {
if (self = [super init]) {
[self open];
}
return self;
}
.........
// Ask delegate to update and display Progress text
-(void) updateProgressSummary:(NSString *)summary detail:(NSString *)detail percentComplete:(NSNumber *)complete {
if (summary != nil)
self.progressUpdate.summaryText = summary;
self.progressUpdate.detailText = detail;
self.progressUpdate.percentComplete = complete;
ProgressUpdate *progressUpdateForIssue = [[ProgressUpdate alloc] initWith:progressUpdate];
[self.delegate performSelectorOnMainThread:@selector(displayProgress:) withObject:progressUpdateForIssue waitUntilDone:NO];
[progressUpdateForIssue release];
}
RootViewController.m
// Delegate method to display specific text in Progress label
- (void) displayProgress:(ProgressUpdate *)update {
[progressSummaryLabel setText:update.summaryText];
[progressDetailLabel setText:update.detailText];
[progressBar setProgress:[update.percentComplete intValue]];
[progressView setNeedsDisplay];
}
感谢Sreehari,但它没有区别。 – Chris 2011-04-19 09:52:18