將文本垂直對齊到UILabel中的頂部我有一個UILabel有兩行文字的空格。有時，當文本太短時，此文本將顯示在標簽的垂直中心。如何垂直對齊文本，使其始終位于UILabel?
3 回答
慕標琳琳
TA貢獻1830條經驗 獲得超9個贊
設置新的文本： myLabel.text = @"Some Text"
設置 maximum number為0行(自動)： myLabel.numberOfLines = 0
將標簽的框架設置為最大大?。?/trans> myLabel.frame = CGRectMake(20,20,200,800)
打電話 sizeToFit以縮小幀大小，使內容只適合： [myLabel sizeToFit]
慕森卡
TA貢獻1806條經驗 獲得超8個贊
for(int i=1; i< newLinesToPad; i++) self.text = [self.text stringByAppendingString:@"\n"];
for(int i=0; i<newLinesToPad; i++) self.text = [self.text stringByAppendingString:@"\n "];
UILabels
@" \n@%""\n@%"
// -- file: UILabel+VerticalAlign.h#pragma mark VerticalAlign@interface UILabel (VerticalAlign)- (void)alignTop;
- (void)alignBottom;@end// -- file: UILabel+VerticalAlign.m@implementation UILabel (VerticalAlign)- (void)alignTop {
CGSize fontSize = [self.text sizeWithFont:self.font];
double finalHeight = fontSize.height * self.numberOfLines;
double finalWidth = self.frame.size.width; //expected width of label
CGSize theStringSize = [self.text sizeWithFont:self.font constrainedToSize:CGSizeMake(finalWidth, finalHeight)
lineBreakMode:self.lineBreakMode];
int newLinesToPad = (finalHeight - theStringSize.height) / fontSize.height;
for(int i=0; i<newLinesToPad; i++)
self.text = [self.text stringByAppendingString:@"\n "];}- (void)alignBottom {
CGSize fontSize = [self.text sizeWithFont:self.font];
double finalHeight = fontSize.height * self.numberOfLines;
double finalWidth = self.frame.size.width; //expected width of label
CGSize theStringSize = [self.text sizeWithFont:self.font constrainedToSize:CGSizeMake(finalWidth, finalHeight)
lineBreakMode:self.lineBreakMode];
int newLinesToPad = (finalHeight - theStringSize.height) / fontSize.height;
for(int i=0; i<newLinesToPad; i++)
self.text = [NSString stringWithFormat:@" \n%@",self.text];}@end[yourLabel alignTop];[yourLabel alignBottom];
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