的UILabel SETFRAME不调整大小的标签，即使是在layoutSubviews

Question

我有：

#import "CustomTableViewCell.h" 

@interface CustomTableViewCell() 
@property (assign) CGRect titleFrame; 
@property (assign) CGRect detailFrame; 
@end 

@implementation CustomTableViewCell 
- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier 
{ 
    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier]; 
    if (self) { 
     // Initialization code 
    } 
    return self; 
} 

- (void)awakeFromNib 
{ 
    if (self.title != nil) { 
     self.titleFrame = self.title.frame; 
    } 
    if (self.detail != nil) { 
     self.detailFrame = self.detail.frame; 
    } 
} 

- (void)setSelected:(BOOL)selected animated:(BOOL)animated 
{ 
    [super setSelected:selected animated:animated]; 

    // Configure the view for the selected state 
} 

- (void) setTitleTo: (NSString *)text { 
    if (self.title == nil || text == nil) { 
     return; 
    } 

    CGSize maximumLabelSize = CGSizeMake(self.title.frame.size.width, FLT_MAX); 
    CGRect expectedLabelSize = [text boundingRectWithSize:maximumLabelSize 
                options:NSLineBreakByWordWrapping | NSStringDrawingUsesLineFragmentOrigin 
               attributes:@{NSFontAttributeName:self.title.font} 
                context:nil]; 
    CGRect newFrame = self.title.frame; 
    newFrame.size.height = expectedLabelSize.size.height; 
    self.titleFrame = newFrame; 

    self.detail.lineBreakMode = NSLineBreakByWordWrapping; 
    self.detail.numberOfLines = 3; 

    [self.title setText:text]; 
    [self setNeedsLayout]; 
} 

- (void) setDetailTo: (NSString *)text { 
    if (self.detail == nil || text == nil) { 
     return; 
    } 

    CGSize maximumLabelSize = CGSizeMake(self.detail.frame.size.width, FLT_MAX); 
    CGRect expectedLabelSize = [text boundingRectWithSize:maximumLabelSize 
                options:NSLineBreakByWordWrapping | NSStringDrawingUsesLineFragmentOrigin 
               attributes:@{NSFontAttributeName:self.title.font} 
                context:nil]; 
    CGRect newFrame = self.detail.frame; 
    newFrame.size.height = expectedLabelSize.size.height; 
    self.detailFrame = newFrame; 

    self.detail.lineBreakMode = NSLineBreakByWordWrapping; 
    self.detail.numberOfLines = 3; 

    [self.detail setText:text]; 
    [self setNeedsLayout]; 
} 


- (void) layoutSubviews { 
    [super layoutSubviews]; 

    if (self.title != nil) { 
     NSLog(@"T: %@", self.title.text); 
     [self.title setFrame:self.titleFrame]; 
    } 
    if (self.detail != nil) { 
     NSLog(@"D: %@", self.detail.text); 
     [self.detail setFrame:self.detailFrame]; 
    } 
} 
@end 

从我正在读here它应该调整到适合文本。

和NSLog的输出：

2014-10-08 20:48:29.474 Test[57397:613] T: Largest Metro 
2014-10-08 20:48:29.475 Test[57397:613] D: Oahu metropolitan area 

我的理解是“瓦胡岛首都圈”应与第二行“区域”是可见的。

Answer 1

三样东西，你应该改变：

• 移动你的标签的大小计算到layoutSubviews。
• 计算标签尺寸的最精确方法是使用-[UILabel sizeThatFits:]来获得所需的尺寸。
• 关闭自动布局