Question

我们都知道我们可以根据文字计算标签或任何控件的高度。像这样：

    NSString *text=@"fwfgwefgwefhwefhwoefhwoeifhoiwefhwoeifhwieofhweohfiweofowefhowefhoweifhweofhweofhweoihfweiofhiowefhweiofhwioefhweiofhiweofhweiofhweiofhweiofhweiofweoifiweofhweoifhiowefhoiwefhowewoefoiwehfoiwe";     
    labelsize=[text sizeWithFont:[UIFont systemFontOfSize:14] constrainedToSize:CGSizeMake(100, 2000.0)];
    NSLog(@"labelsize.height%f",labelsize.height);

现在假设我得到身高= 270。现在我只想要那个高度为200的文本。就像我的标签高度是200，我希望直到200高度文本进入标签，文本的其余部分应显示在另一个标签。所以我想问一下是否有可能根据身高得到文本。

提前致谢！

Answer 1

CGFloat maxHeight = 500;
NSString *text = @"fwfgwefgwefhwefhwoefhwoeifhoiwefhwoeifhwieofhweohfiweofowefhowefhoweifhweofhweofhweoihfweiofhiowefhweiofhwioefhweiofhiweofhweiofhweiofhweiofhweiofweoifiweofhweoifhiowefhoiwefhowewoefoiwehfoiwe";
NSMutableString *tmpText = [[NSMutableString alloc] initWithString:text];
NSRange range = NSMakeRange([tmpText length] - 1, 1);
while ([text sizeWithFont:[UIFont systemFontOfSize:14] constrainedToSize:CGSizeMake(100, 2000.0)].height > maxHeight) {
    [tmpText deleteCharactersInRange:range];
    range.location--;
}
NSLog(@"result: %@", tmpText);
[tmpText release];

我认为这可以胜任。它没有经过全面测试，但确实有效。

Answer 2

根据您的需要，您可以根据自己的兴趣更改标签文字。这是我的示例代码。

NSMutableString *tmpLabel2=[[NSMutableString alloc]init];
NSString *text=@"Hello friend what r u doin..? what is going on in your company.. Tell me something yar i want to meet with u whenever u free just call me i will be der ok rest is perfect. talk u later…";     
NSMutableString *tmpLabel1 = [[NSMutableString alloc] initWithString:text];
NSRange range = NSMakeRange([tmpLabel1 length] - 1, 1);

CGSize  labelsize=[text sizeWithFont:[UIFont systemFontOfSize:14] constrainedToSize:CGSizeMake(100, 2000.0) lineBreakMode:UILineBreakModeWordWrap];
while ([tmpLabel1 sizeWithFont:[UIFont systemFontOfSize:14] constrainedToSize:CGSizeMake(100, 2000.0)].height > 200) {

    unichar Char=[tmpLabel1 characterAtIndex:[tmpLabel1 length]-1];
    NSString*strTemp=[NSString stringWithFormat:@"%C",Char];
    [tmpLabel2 insertString:strTemp atIndex:0];
    [tmpLabel1 deleteCharactersInRange:range];
    range.location--;
}

label.frame=CGRectMake(50, 50, labelsize.width, 200);
label.text=tmpLabel1;
label.font=[UIFont fontWithName:@"Arial" size:14];
label.numberOfLines=0;
label.clipsToBounds=YES;
label.adjustsFontSizeToFitWidth=YES;
label.lineBreakMode=UILineBreakModeCharacterWrap;
label.backgroundColor=[UIColor grayColor];

NSLog(@"first Label is: %@", tmpLabel1);
NSLog(@"Second Label is: %@", tmpLabel2);

}

根据高度获取文本

2 个答案: