ios label首行缩进问题

@property (weak, nonatomic) IBOutlet UILabel *contentLabel;

@end

@implementation WJAboutMFViewController

- (void)viewDidLoad {

[super viewDidLoad];

// 调整行间距

NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:self.contentLabel.text];

NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];

[paragraphStyle setLineSpacing:7];

paragraphStyle.firstLineHeadIndent=32;

[attributedString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, [self.contentLabel.text length])];

self.contentLabel.attributedText = attributedString;

[self.contentLabel sizeToFit];

self.contentLabel.numberOfLines=0;

}