如何中心標題文本WKInterfaceButton與iOS WatchKit

Question

我嘗試這樣做：

[myWKButton.titleLabel setTextAlignment: NSTextAlignmentCenter]; 

我得到的錯誤：

property titlelabel not found on object of type wkinterfacebutton

我怎樣才能做到這一點？

Answer 1

WKInterfaceButton class沒有titleLabel屬性，這就是你得到這個錯誤的原因。要設置標題的對齊方式，請使用其屬性attributedTitle。

NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init]; 
paragraphStyle.alignment = NSTextAlignmentCenter; 

NSAttributedString *attributedString = [[NSAttributedString alloc] initWithString:yourTitle attributes:@{NSParagraphStyleAttributeName: paragraphStyle}]; 
[myWKButton setAttributedTitle:attributedString];