If you need to support iOS 6 then simply use UIButtonTypeRoundedRect
instead of UIButtonTypeSystem
. Then it will work under both iOS 6 and 7.
UIButtonTypeSystem on iOS 6
-
16-07-2023 - |
문제
Is the following valid on iOS 6 using Xcode 5 and the latest compiler?
UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];
UIButtonTypeSystem
seems to resolve to the same thing as UIButtonTypeRoundedRect
on iOS 6 as well as iOS 7 if I'm not mistaken but I may be misreading this.
typedef NS_ENUM(NSInteger, UIButtonType) {
UIButtonTypeCustom = 0, // no button type
UIButtonTypeSystem NS_ENUM_AVAILABLE_IOS(7_0), // standard system button
UIButtonTypeDetailDisclosure,
UIButtonTypeInfoLight,
UIButtonTypeInfoDark,
UIButtonTypeContactAdd,
UIButtonTypeRoundedRect = UIButtonTypeSystem, // Deprecated, use UIButtonTypeSystem instead
};
해결책
다른 팁
The docs are your friend. Searching under UIButtonTypeSystem
, we find:
UIButtonTypeSystem A system style button, such as those shown in navigation bars and toolbars. Available in iOS 7.0 and later.
So no, UIButtonTypeSystem is new in iOS 7. Results for older OS versions will be undefined.
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