目标C求字符串的像素宽度

我有一个固定宽度的ui按钮,我想在其中放置文本。因为字符串的大小事先未知,所以在从平面文件读取字符串时,我必须调整字体的大小。我该怎么做?类似于以下功能的功能将非常好:

uiFONT resizefontas:(uiFONT)initialFONT andstringas:(nsstring*)string andwidthas:(int)width
< /代码> 

提前谢谢

编辑:此代码似乎不起作用:

创建按钮的方法,具有背景图像和其他属性
-(uibutton*)带标题的getcalagentbuttons:(nsstring*)标题和图像:(uiimage*)bgimg atindex:(int)索引{
uibutton*abuton=[uibutton buttonWithType:uibuttonTypeRoundedRect];
abuton.frame=cDirectmake(10,2+索引*50,300,48);
abutton.titlelabel.frame=cDirectmake(abutton.titlelabel.frame.origin.x+25.0,abutton.titlelabel.frame.origin.y,abutton.titlelabel.frame.size.width-50.0,abutton.titlelabel.frame.size.height);
//abuton.titlelabel.font=[uifont-boldSystemFontOfSize:12];
[abuton settitlecolor:uicolorfromRGB(0xFDD428)for state:uicontrol状态正常];
[Abuton BackgroundImage:bgimg for State:uicontrol状态正常];
[abuton addtarget:self action:@selector(callagent:)forcontrolevents:uicontroleventTouchupInside];
//将标记设置为索引,稍后使用它获取电话号码
[abuton settag:索引];
返回阿布顿;
}
< /代码> <


我有一个固定宽度的ui按钮,我想在其中放置文本。因为字符串的大小事先未知,所以在从平面文件读取字符串时,我必须调整字体的大小。我该怎么做?类似于以下功能的功能将非常好:

UIFont resizeFontAs:(UIFont)initialFont andStringAs:(NSString*)string andWidthAs:(int)width


提前谢谢

编辑:此代码似乎不起作用:

// Method for creating button, with background image and other properties
- (UIButton *) getCallAgentButtonWithTitleAs:(NSString *)aTitle andImageAs:(UIImage*)bgImg atIndex:(int)index{    
    UIButton *aButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];  
    aButton.frame = CGRectMake(10, 2+index*50, 300, 48);    
    aButton.titleLabel.frame = CGRectMake(aButton.titleLabel.frame.origin.x + 25.0,                   aButton.titleLabel.frame.origin.y, aButton.titleLabel.frame.size.width - 50.0,     aButton.titleLabel.frame.size.height);     
    aButton.titleLabel.adjustsFontSizeToFitWidth = YES;
    [aButton setTitle:aTitle forState:UIControlStateNormal];
    //aButton.titleLabel.font = [UIFont boldSystemFontOfSize:12];   
    [aButton setTitleColor:UIColorFromRGB(0xFDD428) forState:UIControlStateNormal];
    [aButton setBackgroundImage:bgImg forState:UIControlStateNormal];
    [aButton addTarget:self action:@selector(callAgent:) forControlEvents:UIControlEventTouchUpInside];
    // set the tag as the index and use it later to obtain the phoneNo
    [aButton setTag:index];
    return aButton;  
}