的UILabel不會改變

Question

我的代碼：

- (void)viewDidLoad 
{ 
NSString *text = @"fjkldsjfkladsjfkljsdaklfjadsklfjdskjfdskjflkdsahfahfdkdfdsfasdfasdfafjkldsjfkladsjfkljsdaklfjadsklfjdskjfdskjflkdsahfahfdkdfdsfasdfasdfass" 
       "fjkldsjfkladsjfkljsdaklfjadsklfjdskjfdskjflkdsahfahfdkdfdsfasdfasdfas" 
       "fjkldsjfkladsjfkljsdaklfjadsklfjdskjfdskjflkdsahfahfdkdfdsfasdfasdfas"; 

myLabel = [self getTheHeight:text NameofFont:FONT_NAME fontSize:FONT_SIZE LineMode:UILineBreakModeWordWrap]; 
[super viewDidLoad]; 
} 

- (UILabel *)getTheHeight:(NSString *)text NameofFont:(NSString *)font_name fontSize:(float)font_size LineMode:(UILineBreakMode)lineBreakMode 
{ 
CGSize size = [text sizeWithFont:[UIFont fontWithName:FONT_NAME size:FONT_SIZE]]; 

UILabel *temp = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 320, size.height)]; 
[temp setFont:[UIFont fontWithName:FONT_NAME size:FONT_SIZE]]; 
[temp setLineBreakMode:UILineBreakModeWordWrap]; 
[temp setNumberOfLines:0]; 
temp.text = text; 

return temp; 
} 

我有一個返回格式化標籤的方法。 myLabel通過IB推出。問題是返回標籤不影響myLabel。

代碼有什麼問題？ myLabel不會更改文本，框架等。

Answer 1

試試這個，

通過你的mylabel的功能像...

- (void)viewDidLoad 
{ 
NSString *text = @"fjkldsjfkladsjfkljsdaklfjadsklfjdskjfdskjflkdsahfahfdkdfdsfasdfasdfafjkldsjfkladsjfkljsdaklfjadsklfjdskjfdskjflkdsahfahfdkdfdsfasdfasdfass" 
       "fjkldsjfkladsjfkljsdaklfjadsklfjdskjfdskjflkdsahfahfdkdfdsfasdfasdfas" 
       "fjkldsjfkladsjfkljsdaklfjadsklfjdskjfdskjflkdsahfahfdkdfdsfasdfasdfas"; 

[self getTheHeight:text NameofFont:FONT_NAME fontSize:FONT_SIZE LineMode:UILineBreakModeWordWrap withLabel:myLabel]; 
[super viewDidLoad]; 
} 

- (void)getTheHeight:(NSString *)text NameofFont:(NSString *)font_name fontSize:(float)font_size LineMode:(UILineBreakMode)lineBreakMode withLabel:(UILabel*)temp 
{ 
CGSize size = [text sizeWithFont:[UIFont fontWithName:FONT_NAME size:FONT_SIZE]]; 

temp.frame = CGRectMake(0, 0, 320, size.height); 
[temp setFont:[UIFont fontWithName:FONT_NAME size:FONT_SIZE]]; 
[temp setLineBreakMode:UILineBreakModeWordWrap]; 
[temp setNumberOfLines:1]; 
temp.text = text; 
} 

Answer 2

您尚未修改myLabel的屬性。這就是問題。

此問題的解決方案是：將mylabel作爲參數傳遞給函數，並使用該引用修改屬性，並讓該函數不返回任何內容。

Answer 3

我覺得基本問題是根據文字設置標籤的高度。 試試這個代碼： -

它更簡單，你不需要寫一些額外的方法

CGSize labelsize; 
    UILabel *commentsTextLabel = [[UILabel alloc] init];; 
    [commentsTextLabel setNumberOfLines:0]; 
    [commentsTextLabel setBackgroundColor:[UIColor clearColor]]; 
    NSString *text = @"fjkldsjfkladsjfkljsdaklfjadsklfjdskjfdskjflkdsahfahfdkdfdsfasdfasdfafjkldsjfkladsjfkljsdaklfjadsklfjdskjfdskjflkdsahfahfdkdfdsfasdfasdfassfjkldsjfkladsjfkljsdakljadsklfjdskjfdskjflkdsahfahf dkdfdsfasdfasdfasfjkldsjfkladsjfkljsdakladsklfjdskjfdskjflkdsahfahfdkdfdsfasdfasdfas"; 

    [commentsTextLabel setFont:[UIFont fontWithName:@"Helvetica"size:14]]; 
    labelsize=[text sizeWithFont:commentsTextLabel.font constrainedToSize:CGSizeMake(268, 2000.0) lineBreakMode:UILineBreakModeWordWrap]; 
    commentsTextLabel.frame=CGRectMake(10, 24, 268, labelsize.height); 
    [commentsTextLabel release]; 

設定自己的constraintTosize和幀x和y cordinate。