來自enterBackground的UITextField enterForeground，應用程序崩潰

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自定義UITextField：在單擊TextField輸入後，在keyborad彈出窗口後，輸入背景以再次進入前景，應用程序崩潰！來自enterBackground的UITextField enterForeground，應用程序崩潰

，如果你不點擊文本字段輸入，背景或前景的轉換，這是正常現象;部分代碼：

@implementatio BKSearchViewController 
    - (void)setNavgationView { 
     BKSearchBar *searchBar = [[BKSearchBar alloc] initWithFrame:CGRectMake(20, 27, kScreenWidth - 90, 30)]; 
     searchBar.placeholder = @"輸入暱稱/拜託號"; 
     searchBar.delegate = self; 
     [searchBar setKeyboardType:UIKeyboardTypeDefault]; 
     [searchBar setReturnKeyType:UIReturnKeySearch]; 
     [searchBar setPlaceholderColor:kcallColor(@"a4a4a4")]; 
     [searchBar setPlaceholderFont:kFont(14)]; 
     [searchBar addTarget:self action:@selector(SearchTextFieldDidChange:) forControlEvents:UIControlEventEditingChanged]; 
     [navgationView addSubview:searchBar]; 
    } 
    @end 

    //BKSearchBar The key code 
       @implementation BKSearchBar 
       - (id)initWithFrame:(CGRect)frame 
       { 
        self = [super initWithFrame:frame]; 
        if (self) { 
         // 設置背景 
         self.backgroundColor = kcallColor(@"7d1d57"); 
         self.returnKeyType = UIReturnKeySearch; 
         // 設置內容 -- 垂直居中 
         self.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter; 
         [self UI]; 
        } 
        return self; 
       } 
    - (void)UI{ 
     // 設置左邊顯示一個放大鏡 
     UIImageView *leftView = [[UIImageView alloc] init]; 
     omit... 
     //右邊的view 
     UIImageView *rightView = [[UIImageView alloc] init]; 
     omit... 
    } 
      - (CGRect)placeholderRectForBounds:(CGRect)bounds{ 
       CGRect rect = CGRectMake(self.leftView.right, (self.height - 24)/2, bounds.size.width, 14); 
       return rect; 
      } 
      - (void)clearText{ 
       self.text = nil; 
      } 
      - (void)setPlaceholderColor:(UIColor *)color{ 
       [self setValue:color forKeyPath:@"_placeholderLabel.textColor"]; 
      } 
      - (void)setPlaceholderFont:(UIFont *)font{ 
       [self setValue:font forKeyPath:@"_placeholderLabel.font"]; 
      }

來源

2016-11-16 NegHao

'背景或前景轉換'？不能得到你的問題，並顯示原始代碼不顯示任何圖像的代碼。 – vaibhav

不要發佈有關代碼的截圖，而是直接發佈代碼！ – Lion

你有沒有實現UISearchBar委託？如果是，請發佈該代碼，以便我們可以瞭解發生了什麼問題。 – CodeChanger

感謝所有的問題得到解決，因爲運行時的

！！

+ (void)swizzleInstanceMethod:(Class)class originSelector:(SEL)originSelector otherSelector:(SEL)otherSelector 
{ 
    Method otherMehtod = class_getInstanceMethod(class, otherSelector); 
    Method originMehtod = class_getInstanceMethod(class, originSelector); 
    // 交換2個方法的實現 
    method_exchangeImplementations(otherMehtod, originMehtod); 
}

來源

2016-11-17 02:15:38 NegHao

來自enterBackground的UITextField enterForeground，應用程序崩潰

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