[[self.view subviews] makeObjectsPerformSelector:@selector(removeFromSuperview)];
[[self.view subviews] enumerateObjectsUsingBlock:^(id _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
[(UIView*)obj removeFromSuperview];
}];
[[self.view subviews] makeObjectsPerformSelector:@selector(removeFromSuperview)];
[[self.view subviews] enumerateObjectsUsingBlock:^(id _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
[(UIView*)obj removeFromSuperview];
}];
本文标题：13.iOS一次性移除所有子视图
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