當調用sizeToFit時發送到實例的無法識別的選擇器發生崩潰ios應用程序

我發現了幾個與此類似的問題，但無法找到答案。我剛開始使用attributedText在我的標籤設置文本格式，它是引發此錯誤：當調用sizeToFit時發送到實例的無法識別的選擇器發生崩潰ios應用程序

-[__NSCFType _isDefaultFace]: unrecognized selector sent to instance 0x20880f40 
2014-03-18 19:44:57.039 appName[317:907] *** Terminating app due to uncaught exception  'NSInvalidArgumentException', reason: '-[__NSCFType _isDefaultFace]: unrecognized selector sent to instance 0x20880f40'

這是我的方法

-(void) SetDetails 
{ 
if(_curInfo) 
{ 

    NSUInteger length=[_curInfo.company_name length]; 
    NSString* des = [NSString stringWithFormat:@"%@\r%@\r\r", _curInfo.company_name, _curInfo.description]; 
    NSUInteger length2=[des length]; 

    NSString* descript = [NSString stringWithFormat:@"%@\r%@\r\rTerms\r%@", _curInfo.company_name, _curInfo.description, _curInfo.terms]; 
    NSMutableAttributedString* attrStr = [NSMutableAttributedString attributedStringWithString:descript]; 

    [attrStr setFontName:@"System - System Bold" size:17 range:NSMakeRange(0, length)]; 
    [attrStr setTextBold:YES range:NSMakeRange(0, length)]; 

    [attrStr setFontName:@"System - System Bold" size:17 range:NSMakeRange(length2, 5)]; 
    [attrStr setTextBold:YES range:NSMakeRange(length2, 5)]; 



    _lblDescription.attributedText=attrStr; 





    [_lblDescription sizeToFit]; 




    _lblReward.text=_curInfo.reward; 

    CGFloat scrollViewHeight = 0.0f; 
    for (UIView* view in scroller.subviews) 
    { 
     scrollViewHeight += view.frame.size.height; 

    } 

    [scroller setContentSize:(CGSizeMake(320, scrollViewHeight))]; 

} 
}

當執行這條線這是引發錯誤[_lblDescription sizeToFit];

我絕不是這方面的專家，任何建議或建議都非常感謝。

頭文件的情況下，它是需要：

#import <UIKit/UIKit.h> 
#import "ServiceConnector.h" 
#import "Global.h" 

@interface RestaurantDetail : UIViewController<ServiceConnectorDelegate, UIAlertViewDelegate>{ 
    IBOutlet UIScrollView *scroller; 

} 

@property (nonatomic, retain) IBOutlet UIImageView* imgCompany; 
@property (nonatomic, retain) IBOutlet UILabel* lblTopName; 
@property (nonatomic, retain) IBOutlet UILabel* lblReward; 
@property (nonatomic, retain) IBOutlet UILabel* lblCity; 
@property (nonatomic, retain) IBOutlet UILabel* lblStreet; 
@property (nonatomic, retain) IBOutlet UIButton* btnStreet; 

@property (nonatomic, retain) IBOutlet UILabel* lblDistance; 
@property (nonatomic, retain) IBOutlet UIButton* btnReward; 
@property (nonatomic, retain) IBOutlet UILabel* lblDescription; 

@property (nonatomic, retain) RestaurantInfo* curInfo; 
@property (nonatomic, retain) BonusInfo*  bonusInfo; 
@property (nonatomic, retain) NSString*  website; 


-(IBAction)BackClicked; 
-(IBAction)GetRewardClicked; 
-(IBAction)TermsClicked; 
-(void) GetDetails; 
-(void) SetDetails; 
- (IBAction)StreetClicked; 

// service connector delegate 
- (void)requestReturnedData:(NSData*)data; 

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex; 

@end

來源

2014-03-19 tomjung

它看起來好像有些對象被釋放，當你不希望它是。我會在你的構建方案中打開殭屍，看看是否會給你一個更有用的錯誤信息。 –

看看你的'屬性字符串'字體設置，如果它仍然是最新的：https：//developer.apple.com/library/ios/documentation/cocoa/reference/foundation/Classes/NSMutableAttributedString_Class/Reference/ Reference.html＃// apple_ref/occ/instm/NSMutableAttributedString/addAttribute：value：range： https://developer.apple.com/library/ios/documentation/cocoa/Conceptual/AttributedStrings/AttributedStrings.html#//apple_ref/doc/uid/10000036i – lootsch

那麼，異常堆棧顯示錯誤發生在哪裏？你是否在任何地方調用'isDefaultFace'？ –

謝謝大家誰評論。這讓我指出了正確的方向來解決這一問題。它似乎確實是一個記憶問題，雖然我不完全理解它，它不喜歡我如何改變我的屬性字符串。

我改變了這種

[attrStr setFontName:@"System - System Bold" size:17 range:NSMakeRange(0, length)]; 
[attrStr setTextBold:YES range:NSMakeRange(0, length)];

這個

[attrStr addAttribute:NSFontAttributeName value:[UIFont boldSystemFontOfSize:17] range:NSMakeRange(0, length)];

來源

2014-03-19 19:22:46 tomjung

當調用sizeToFit時發送到實例的無法識別的選擇器發生崩潰ios應用程序

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