Question

我有UITextView文本，用户按DONE后，我将文本转换为UIImageView并显示它。它适用于一行非常好的文本，

。但是如果用户键入两行或更多行：结果仍然是一行??? Screenshot 2

我想在UIimageView中显示两行或更多行

任何人都可以帮助我！非常感谢你！

这是我的代码：

-(UIImage *)convertTextToImage : (ObjectText *) objT; 
{ 
    UIGraphicsBeginImageContext(CGSizeMake(([objT.content sizeWithFont:objT.font].width+10), ([objT.content sizeWithFont:objT.font].height+10)));
    [[objT getcolor] set];
    [objT.content drawAtPoint:CGPointMake(5, 5) withFont:objT.font];
    UIImage *result = UIGraphicsGetImageFromCurrentImageContext();     
    UIGraphicsEndImageContext(); 
    return result; 
}

Answer 1

您的问题是您依靠sizeWithFont方法来完全控制标签的大小。在不限制宽度的情况下，标签将始终扩展到足够宽的框架，以便文本显示在一行上。

尝试此操作（代码会将宽度限制为您指定的宽度）：

-(UIImage *)convertTextToImage : (ObjectText *) objT; 
{ 
    //THIS IS THE MAX WIDTH YOU WANT, and anything wider would wrap to two lines
    CGFloat desiredWidth = 100.0;
    CGSize sizeToConstrainTo = CGSizeMake(desiredWidth, 5000);
    CGSize newSize = [objT.content sizeWithFont:objT.font
                              constrainedToSize:sizeToConstrainTo
                                  lineBreakMode:UILineBreakModeWordWrap];
    UIGraphicsBeginImageContext(newSize);
    [[objT getcolor] set];
    [objT.content drawAtPoint:CGPointMake(5, 5) withFont:objT.font];
    UIImage *result = UIGraphicsGetImageFromCurrentImageContext();     
    UIGraphicsEndImageContext(); 
    return result; 
}

Answer 2

抽象属性

NSString* textContent = @"Hello, World!";
NSString* text2Content = @"Hello, World!"; 
NSString* text3Content = @"Hello, World!"; 
NSString* text4Content = @"Hello, World!";

文字绘图 - 1

CGRect textRect = CGRectMake(65, 43, 56, 55);
[[UIColor blackColor] setFill];
[textContent drawInRect: textRect withFont: [UIFont fontWithName: @"Helvetica" size: 12] lineBreakMode: UILineBreakModeWordWrap alignment: UITextAlignmentCenter];

文字绘图 - 2

CGRect text2Rect = CGRectMake(77, 79, 37, 31);
[[UIColor blackColor] setFill];
[text2Content drawInRect: text2Rect withFont: [UIFont fontWithName: @"Helvetica" size: 12] lineBreakMode: UILineBreakModeWordWrap alignment: UITextAlignmentCenter];

文字绘图 - 3

CGRect text3Rect = CGRectMake(118, 74, 49, 43);
[[UIColor blackColor] setFill];
[text3Content drawInRect: text3Rect withFont: [UIFont fontWithName: @"Helvetica" size: 12] lineBreakMode: UILineBreakModeWordWrap alignment: UITextAlignmentCenter];

文字绘图 - 4

CGRect text4Rect = CGRectMake(71, 17, 41, 28);
[[UIColor blackColor] setFill];
[text4Content drawInRect: text4Rect withFont: [UIFont fontWithName: @"Helvetica" size: 12] lineBreakMode: UILineBreakModeWordWrap alignment: UITextAlignmentCenter];

Answer 3

这是我的答案，我认为这是好方法。试试这段代码：

- （UIImage *）convertTextToImage：（ObjectText *）objT; { UIGraphicsBeginImageContext（CGSizeMake（[objT.content sizeWithFont：objT.font constrainedToSize：CGSizeMake（900,900）]。width + 10，[objT.content sizeWithFont：objT.font constrainedToSize：CGSizeMake（900,900）]。height + 10））;

[[objT getcolor] set];

[objT.content drawInRect:CGRectMake(5, 5, [objT.content sizeWithFont:objT.font constrainedToSize:CGSizeMake(900, 900)].width, [objT.content sizeWithFont:objT.font constrainedToSize:CGSizeMake(900, 900)].height) withFont:objT.font];

UIImage *result = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return  result;

}

如何在uiimageview iphone上绘制多行文字？

3 个答案: